Anatomy of a muscle cell
Video taken from the channel: Khan Academy
Muscle Fiber Contraction and Relaxation
Video taken from the channel: DeBacco University
Muscles, Part 1 Muscle Cells: Crash Course A&P #21
Video taken from the channel: CrashCourse
Chapter 9.4 Muscle Fiber Contraction BIO201
Video taken from the channel: WyzSci
Myology Skeletal Muscle Contraction
Video taken from the channel: Armando Hasudungan
The Mechanism of Muscle Contraction: Sarcomeres, Action Potential, and the Neuromuscular Junction
Video taken from the channel: Professor Dave Explains
Muscle Contraction Cross Bridge Cycle, Animation.
Video taken from the channel: Alila Medical Media
Muscle contraction occurs when a muscle fiber or group of fibers is signaled by the brain via nerves to activate and increase the tension within the muscle. It is also called muscle fiber activation. Your body has three different types of muscles and they contract in three different ways.
The muscular system works to control the movement of our body and internal organs. Muscle tissue contains something called muscle fibers. Muscle fibers consist of.So let’s do a quick review of muscle contraction physiology: An action potential in a motor neuron causes acetylcholine to release in the synaptic cleft. Acetylcholine binds with receptors on the cell membrane on the muscle fiber, opening Ca2+ -Na+ channels.
Usually referred to as Calcium channels.Share: CONTRACTION AND Peace On the Muscle FIBER Contraction and peace of your muscle mass fiber occurs during the heart during the course of pumping of blood towards entire body. The guts is sensitive organ while in the whole body that’s a fist size and weigh amongst 250 and 300grams.The heart is enclosed within a double walled sac known as pericardium outdoors, myocardium within the.Muscle contraction begins when the nervous system generates a signal.
The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron. The neuromuscular junction is the name of the place where the motor neuron reaches a muscle cell. Skeletal muscle tissue is composed of cells called muscle fibers.A cross-bridge forms between actin and the myosin heads triggering contraction.
As long as Ca ++ ions remain in the sarcoplasm to bind to troponin, and as long as ATP is available, the muscle fiber will continue to shorten…
.
. Muscle contraction usually stops when signaling from the motor neuron ends, which repolarizes the sarcolemma and T-tubules, and closes the voltage-gated calcium.The theory of contraction called the Interdigitating Filament Model of Muscle Contraction, or the Sliding Filament Theory of Muscle Contraction, says that the myosin of the thick filaments combines with the actin of the thin filaments, forming actomyosin and prompting the filaments to slide past each other.During contraction, the thin filaments slide past the thick filaments, shortening the sarcomere.
This content is not compatible on this device. The thick and thin filaments do the actual work of a muscle, and the way they do this is pretty cool. Thick filaments are made of a protein called myosin.Recently, a number of experiments have shown how to use these building blocks to create filament-based artificial muscles that use the conversion of writhe to extension or contraction, exposing.The contraction of a striated muscle fiber occurs as the sarcomeres, linearly arranged within myofibrils, shorten as myosin heads pull on the actin filaments.
The region where thick and thin filaments overlap has a dense appearance, as there is little space between the filaments.A single motor neuron is able to innervate multiple muscle fibers, thereby causing the fibers to contract at the same time. Once innervated, the protein filaments within each skeletal muscle fiber slide past each other to produce a contraction, which is explained by the sliding filament theory.Muscle Contraction Steps in Detail A signal is sent from the brain or the spinal cord to the muscle via neurons An action potential is generated in the neuron, releasing Ca ++ in the neuromuscular junction The influx of caalcium ions causes acetylcholine (AcH) to be released in the synaptic cleft.Muscle contraction is the activation of tension-generating sites within muscle fibers.
In physiology, muscle contraction does not necessarily mean muscle shortening because muscle tension can be produced without changes in muscle length, such as when holding a heavy book or a dumbbell at the same position. The termination of muscle contraction is followed by muscle relaxation, which is a.Vertebrate muscles and tendons are derived from distinct embryonic origins yet they must interact in order to facilitate muscle contraction and body movements.
How robust muscle tendon junctions (MTJs) form to be able to withstand contraction forces is still not understood. Using techniques at a single cell resolution we reexamined the classical view of distinct identities for the tissues.A muscle fiber contains many myofibrils, which are cylinders of muscle proteins. These proteins allow a muscle cell to contract.
Myofibrils contain two types of filaments that run along the long axis of the fiber, and these filaments are arranged in hexagonal patterns. There are thick and thin filaments.
List of related literature:
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| from Build Your Running Body: A Total-Body Fitness Plan for All Distance Runners, from Milers to Ultramarathoners—Run Farther, Faster, and Injury-Free |
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| from Anatomy & Physiology E-Book |
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| from An Introduction to Human Movement and Biomechanics E-Book |
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| from Concise Textbook of Human Physiology |
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| from Swimming Fastest |
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| from Human Physiology: From Cells to Systems |
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| from Essentials of Medical Physiology |
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| from Snell’s Clinical Anatomy by Regions |
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| from Berne and Levy Physiology E-Book |
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| from Davidson’s Principles and Practice of Medicine E-Book |
209 comments
OMG!!! I get it now. Thats so awesome. Thank you soooo much!!
He: It is better to leave further topics for another day since it is really important to understand the basics first
Me: xxxx
this is certainly one of THEE MOST informative videos haha, i will need to watch it a few more times XD
Loved these videos-extremely helpful. The only thing that bothered me is that the plural of nucleus is nuclei; I cringed every time I heard ‘nucleuses’.
ur videos are so unique and so clear….ur making my neet exams concepts clearer..thanku
Take the hesi next month, just brushing up on some concepts ��.
Thank u so much ur videos are very helpful for us here in Algeria as medical students
So my muscles move like a caterpillar’s legs when it walks? I’m too high for this shit.
This 2 minute video did a better job than what my professor did in a hour
Have blown my mind! Literally, I have had spent a lot of time to understand this topic, but your explanation is AMAZING!
Thank you sir for helping a first year med student������
why am I learning this in 11th grade biology….everyone here is in med school wtf
Such a great video. Why can’t my teachers be so clear when they teach?
Thank you so much for this! Great animation, it certainly made it easier for me to understand.
2 hours of lecture, 1 hour of class asking questions, 1 hour of review next class… Students confused.
Watch this 12 minute video. Concepts understood.
I do understand that copyright is a problem, however can you please place your organizations name in the corner of the video. It is hard to see the terminology and pay attention to the content of the video with “Allia…” written on top of the animation.
Great video, but thumbs down for adding the annoying pop-ups that you have to change screen size to escape out of.
This makes like stil no fucking sense but i can tell this is a good video
The most confusing part is that it sounds like we should be consuming a thousand times more calcium than we do
Thank you for watching! Follow us on Twitter https://twitter.com/AlilaMedical for instant notification of our new videos!
“let the crawling begin!” lol i dunno why but this had me cracking up…
Wooow this is explained perfectly, i wish now my professor ask me this hahaha
This was nice and slow and very easy to understand. Thank you so much
Watching your videos is like learning is fun….LOVE The way u present Hank!!!!…thanks loads…keep up this great teaching…..
why is atp used during tetanus if the myosin heads can’t pull the actin in any further?
OMG!!!!,, This is the most outstanding teaching performance that I’ve ever witnessed in my entire Fucking life. thank you so much and you are a true hero indeed.
This was the amazing. I don’t often see videos that are are so easy to follow and simplify the complicated process as well as you did. Thank you.
thank you so much… reading the book i was going mad and this made it so easy for me to understand… ��
Very thorough video on muscle contraction though one crucial point is ignored. It’s how we achieve isometric or isotonic contraction.
It’s funny how many thousands of dollars I’m paying to get a piece of paper that says I learned all of this stuff. I come to your channel to genuinely understand this after PhDs being paid to teach it to me have throughly confused me, lol.
It is clearly the best and plain video about the muscle contraction mechanism, thanks for your huge work.
Do muscles push or pull at the micro level? Is there a push thus creating a pull or a pull thus creating a push?? If things are opening the micro level that would indicate a push motion starting the process of contraction.???
U havent talked about ATP? How many atp are used? Where atp are formed
Thank you so much…itz so helpful to understand very easily..����
Thank you for you amazing videos. I am also a teacher. What format/program are you using for these videos? Connie
Does anyone else know?
amazingly explained with lots n lots of efforts….thankyou so much
please put some videos related to cell cycle
Seriously such a helpful video! I appreciate your work so much and I know countless do as well!
CAN YOU PLEASE FIX YOUR HANDWRITING I AM TRYING TO GET MY WORK DONE!!!!
You are one amazing man for doing these types of videos! incredibly simple explanation and the way you combine it with a love story gives anyone who watches a better understanding as to what is going on in your muscles! We should just watch these videos for class!
thank you for these videos my classmates and i watch these in study group #teammedschool
i learned that….my profesor just said this is a mucle fyber
First semester at med school, lots of gratitude from Greece!
Why did I go to med school armando? The education system is so rigged, need to pay huge money and listen to shitheads for years to get a “degree”..
where are your references and studies you based on in your playlists…
This happened me so much understand the concept of muscle contractions!! life saver!!!
I can’t believe it I still watch this in 2020 thank you guys!
PROFESSOR DAVE sir you just saved my life. No amount of ‘thank you’s’ could amount to how grateful I am for your videos!!
Can you explain the mechanisms by which an increase in cytosolic Ca2+ concentration initiates contractile activity in skeletal muscle cells please
Awesome way and awesome photos to make us understand, it made me go throw this part in histology pretty well but only one thing is still unknown to me which is the site of the A-I junction.
Where is it exactly?
Loved this video!!! My professor is about teaching the “concept” but look at YouTube for lectures!! I don’t understand it either, but text books can be so dry with material and i am a visual learner, So THANK YOU for posting this!!! breaking it down the way you did really helped
This honestly saved my grades thankyouuuuuuu! my prof could never
Great video thank you so much to explain a very detail about muscle contraction
When the actin is at rest does it always carry the phosphate and ADP? When the cycle restarts, does new calcium come in or the same calcium stays attached?
Excellent video. Concept Very well explained with good drawings / diagrams. Much much easier than reading & understanding directly from the text. ��
Being able to visualize the process really helps a lot! If you could speak a tad slower would be helpful for me. Your hand is moving quickly as well as your speech, caused me to rewind a few times. Otherwise, the illustrations are wonderful and makes this a great tutorial.
I am a MMC Student…i am understand this concept very much… tq u for this video
But, how does this depolarization cause an action potential to develop
I watched this years ago in high school, I watched it again in medschool and now preparing for usmle I’m watching it again. Crash course is one of the best resources I’ve ever seen. ������ ��
is this a different mechanism compared to the calcium induced calcium release?
Professor, how to neutralize kerosene??
I mean, ” if we slowly drops pieces of zinc into nitric acid or aquaregia, it loses its reactivity slowly making lots of hiss sounds and then the acid is unreactive as water, even if we dip our fingers into such acid nothing happens..”
☝ Like ways, tell me something that kerosene/ petroleum is reactive with and make them loose their power.
i loved how he closed it, he knows im about to watch this 6 times…
Troponin:
1) binds to actin TnI
2) binds to tropomyosin TnT
3) binds to calcium TnC
Correct me if I’m wrong..
Nice explanation but..
It is sarcoplasmic reticulum not sacroplasmic.& many mistakes.
I appreciated the graphic and explanation about the impulse travelling along the sarcolemma and the T-tubules. That’s what I’ve been trying to grasp but none of the other videos I’ve watched explain it.
I wish I could like this video a million times. Thank you so much!
Love You.I don’t know how to thank you,i am electrical engineer pursuing my master thesis in prosthesis and my research on focused on using FSR Sensor instead of EMG..
A long time ago, when I was in the hell known as organic chemistry, I used to watch this guys videos. Now I’m watching his videos for the MCAT.
I love how this episode references Captain America: The First Avenger and Titanic, which are two of my favorite films. Yes, muscles do make me think of Chris Evans as Steve Rogers.
I really like what you did here! Very clean and easy explanation.
One minor faulty though: Sarcomere, not sacromere..
Keep up the good work!
Used Khan during undergrad and once again, during graduate school. Thank you!!!!
This video was very helpful in terms of describing the internal energy stored in myosin heads. The ADP and Pi are not instantly released from the head when the hydrolysis had occurred.
I would love to handle Professor Dave’s thick filament ❤ ����⚕️
Learnt this last year in 11th Grade, and this recollection was just awesome, even though it’s all a lot!:D
Dear sir but how force is generated??? Is it due to the fact that phosphate molecule from atp shoots outwards, in reaction to which myosen head swings inward which is nothing but netwons 3rd law????
can a hole in skeletal muscle regrow again? And would it have the same functionality like before??
I was reading my A&P textbook about this and did not understand how the function works. So then I remembered Sal and searched for this video. thanks!
3:53 “… these sarcoplasmic reticulum…”
The word “reticulum” is singular, so does not belong with “these”. That’s like saying “… these person…”.
Would be cool to watch a recording of a magnifying glass that shows this process occurring and then saw then simplified diagrams…
its amazing how a simple muscle can be more complex than a circuit board
whoever this dude is teaching in this video, hes the man! EVery video he teach is awesome and soooo easy to understand! PLease keep it up, you are the reason I am understanding everything in my human biology class!
Me at med school.
Abandons lecture slides.
Google Professor Dave.
Everything makes sense.
Amazing job explaining this. Can not imagine there are some people with thumps down to this video.
“Hopefully you found that mildly useful.” No, this basically saved me hours of studying and deciphering my teacher’s powerpoint!
This is awesome for review to make sure you understand the big picture. Shared your video with my study partner. Thank you!
Clearer explanation & excellent presenting ability u’ve!!!
Thank you so much sir, u makes my day!!!:)
imagine a 12th standard student drawing those diagrams in the answer sheet.
This literally what I needed, I seem to learn these kind of topics better through visual video and detailed analysis.
You my friend give the best one, efficiency and effortthx a bunch ����
would’ve been good if a huge water mark wasn’t placed on the video
So well explained with all colors which is making it easier. Thnkx a lot!
So.. repetition increases the amount of muscle fibers reacting as long as we are consuming enough calcium to fuel this reaction?
Great as always except a small nitpicking: ( 2:40) “sacrolemma” -> “sarcolemma”; ( 3:05) “sacromere” -> “sarcomere”; ( 3:30) “sacroplasmic R.” -> “sarcoplasmic R.” By the way, calcium ions are not getting into T-tubules but rather into sarcoplasm via the vast network of SR itself, I think.
what about “calcium induced calcium release”?? you haven’t mentioned that here?
could you explain it to me
If you are looking to have an outstanding body, you should definitely take a look on Google for “SSM Muscle Method”. You are guaranteed to get the appearance you want.
short, succinct, to the point, animated. No unnecessary comments that take up time or throw me off. Thank you so very much for this and so many other videos.
Overall it is a very good video. However, I don’t like the way that they show that the entire thick filament is moving up and down. I just think that could maybe get confusing because that is isn’t what’s actually happening.
wow you explained way better in 7 min then what my biology teacher took 3 days to explain
This is so amazing! For a a first year medical student this is amazingly helpful! Thank you:)
Lovely but friendly advise check your sense of humor and diversity before you do some serious unnecessary stress on your innocent brain ��
its truly amazing how you can sum up 6 hours of lecture 3 days a week into just over 16minutes, and yes I’m quite serous.
at 1:08, it exposes actin binding sites and NOT myosin binding sites
In 7 minutes i learned more than reading the book for an hour. Thank you.
I’m 13 and i’m a girl, i already have a lot of muscles came out, such as abs, biceps and stuff, is it normal for me?
This was amazing! you explained this so well! I did not understand in an hour and thirty minutes in lecture! i understood it in 7 minutes!! thanks
This was explained so well!! Thank you!:) I sometimes got distracted by how incredible the artwork was lol
muscle contraction = filaments slide past each other = sarcomere shortening = muscle shortening. I am confused then how isometric contractions work?
one small section with a black and white picture that’s slightly blurry in my textbook….
is it bad that i’m thirteen and attempting to watch all of this Anatomy and Physiology course?
Doc, tell me something that could make kerosene / petroleum into dud.. I mean non-flammable.
Thank you so much for all of your lectures online. I just spent 3 hrs going from one video to the next. I am taking an online course so it’s hard when you don’t hear someone talk or write on a chalkboard. Your slow speech, clear explanations and incredible art talent, I am learning so much that my intense, super difficult book tried. Thank you soooo much for being born:)
Man you’re great…my MCAT topic is all cleared out ❤️❤️❤️❤️
currently going through all of your videos I’m taking Anatomy I love your videos and the animation makes it easier to understand than reading it through the book your videos have helped me so much wish I would have discovered you before starting class still have 2 more months and the semester ends thank you for your videos so informative and easy to comprehend and animations are fun to watch ����
I wish youtube allowed us to like a video multiple times, everytime you finished a point i went to press the like button only to realise i already pressed it (this happened multiple times)
Incredible! Your videos piece all of this information together so well. Thank you so much for putting this out here!
I nvr thought working of muscles �� can turn to romeo and n Julie stry ��
I didn’t find this mildly useful but very useful.Thanks for sharing your knowledge on this in a much clearer way.
Could u like put in a link of everything u drew for us to print out cuz I always end up copying everything you do to remember it
This 2 and a half minute video just taught me more than my 3 hour lecture.
It seems I’m alone when I say that this video had too much nonsense. What’s with this “love” stuff?
Did the narrator find a boyfriend or girlfriend?
I just wanted to hear the science behind this.
I still watched the video.
Very helpful thank you. Just a minor error @ 6:12 where you should be drawing Knot K+
plz don’t talk too much fast it is hard to understand 95% all around the world English is a second language.
“googles “Chris Evans when he first walks out of that machine in Captain America”*
Me: Yes, I see.
The “chemistry” between myosin & actin makes my heart beat (:
followed you till 6 minute mark then i wasnt quite lost but if someone asked me to explain everything after I definitely would not be able to haha what a load of info! Thanks!
Does the calcium ions attached to troponin get detached or not??
Hank: “As you sit there and eat”
Me: eating nachos; feeling like I’m being watched and judged ��
Hank: “….or Texting, Reading, Notes, etc”
Me: Still offended for being called out.
It really helps the common person to understand why eating right is so important to the functions we take for granted. I would love to see a simplified version of this where the potassium, calcium and sodium… and any other vitamins (B vitamins, E and magnesium, ect.) as well as drinking enough water comes into play with muscle contraction and relaxation. It seems to me that many common debilitating conditions could be cured without going to the doctor if only people understood where and how the nutrients work and what happens when you lack them in your diet. I appreciate that this is intended for a higher level of understanding anatomy and physiology, but I like the way you illustrate and thought perhaps you could do a channel on a simpler level that doesn’t scare people away at the startbut keep this channel too.
Great description. It’s really clarifying to see the molecules interact like this. Thank you
idk why im studying this in depth im 12 but i absolutely love it.
What mechanism regulates the reuptake of calcium? There has to be a controlling factor in how quickly or slowly calcium is reabsorbed in the reticulum. Like doing fast rapid contraction / relaxation vs one slow long contraction… Wondering how calcium is “prematurely” kicked off myotin and rapidly reabsorbed in the reticulum only be to rapidly released again, rinse and repeat.
Give animation about latch bridge mechanism of smooth muscle
If my professor taught this clearly I could keep up with class
I am from India, can you tell me that Liam is a treatment for garidal muscular dystrophy?
Good video…Can you talk about muscle injuries and how they heal? Torn/partial torn muscle.
I’m only on 4:26 and this is already so informative and reinforcing my knowledge, thank you so much!
he talks so fast but if you slow him down he sounds SO drunk
Thanks a lot professor! I’m a french biology student and your videos help me have a more global vision and understanding on phenomenas,
Hey man thankxx a lot can u even explain the movements in smooth n cardiac muscles
he said its an endless cycle like us rewatching this video over and over and he’s not wrong lol
Thanks for the video! That filled in some missing parts of the calcium ion pump for me!!
It would be cool if you write a description of the process in the published section
You’re making my first semester at med school a bit easier. Best video I’ve watched on this process so far. Thanks a lot from Germany!
Thank you so much! I found this video very helpful. I like how you started out looking at the whole muscle, and then zoomed in on the myofiber and myofibril. When I was reading this in my textbook, I was having trouble seeing where the diagrams of a sarcomere would fit in when looking at a myofiber or a muscle, but after watching this video I understand it much better. Thanks again. Great video!
Good thing i have a little knowledge in anatomy and physiology because he’s talking way to fast. He not really slowing down for people who never took physiology before.
Why the hell does it feel like I am not studying when I am actually learning something ��
Why there are no myosin filaments in centre i didn’t get this point…?
I have found all of your videos extremely useful! Thank you!
Love this fast talkiing guy! Great learning, informative videos. Use these videos in my classes.
Who is here just because your science teacher is making you watch this during quarantine
I am a 20 year old in college taking human physiology and i swear crashcouse never gets old ���� i cannot tell you how much this channels helps with school!!
When high school teachers played these I would never pay attention. Now in college, my whole medical degree depends on me watching these over and over. Lol
Fantastic video! Absolutely helpful and simplified so it’s very easy to understand. Thank you Khan Academy ����
The videos from Khan Academy are just so amazing!! I’m learning more from the videos than I would be from a 3 hr lecture…
Good video, but it gets very messy at the end, where in order to visualize the flexing muscle mechanism maybe an animation is best because it is not as sloppy
anyone ever wonder why scientists couldn’t name everything something easier for tests?
Totally cleared things up, my Anatomy and Physiology prof couldn’t teach this well in the hour and 15 minutes I spend in that class.
“kind of like you’ll play this video over and over again” way to call me out
Thanks for such good video. This is truly understandable one, than any other video i saw
so nice of u Armando….may you live long dear. you and ninja nerd… what an effort yaaarrr….������
thank you for these videos my classmates and i watch these in study group #teammedschool
Crashcourse, on behalf of all the academic viewers so passionate about learning and those viewers who procrastinate in school, thank you.
Pssst… we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
very nice and understandable video… keep doing this good work…����
Im a bit confused. In the diagram you “pulled” the perimysium out and mentioned it as that, but labeled it as a fascicle. So is the perimysium a group of fascicles? Or just the outer connective tissue that holds each individual fascicle?
Everything was so well described except for the spelling and pronunciation of “sarcolemma/ sarcoplasmic”. It is not “sacro”. Other than that, great job
Does anyone know how water potential is maintained in muscle cells from hydrolysis of glycogen during exercise?
Prof my uni doctor didn’t teach us this amount of information in 50 minutes…
+1 subbed, useful content and thank you for this video. Now I understand it perfectly ^^
i can’t tell if i’m more impressed with his ability to draw on a powerpoint presentation, or his excellent description of the skeletal muscle. Much appreciated video with great explanations!
In the college even the doctor said that I know no one understands what I’m talking about, but you in 16 minutes made it clear ♥️
Watch this TED lecture by Salman Kahn from 2011. The guy and his team are simply legendary.
http://www.ted.com/talks/salman_khan_let_s_use_video_to_reinvent_education
I’m Dutch and even though this is in English, it’s clearer for me than when my teacher explains it!!
awesome awesome awesome…. best way to teach…. concept got cleared by dis demonstration ��… thnx aloooooot
ADHD question!:
Are they drawing with a mouse or a pencil on a smart board? It’s been bothering me for years. Someone please debunk this ������
I finally have an idea of what is going on in my Anatomy class, I wished that I watched u since the beginning of the semester
very good. You are very talented and i realy want to be your You Tube friend
i hate learning about this type of thing so much because of how much of it needs to be understood on a more conceptual level. But your video and explanation is phenomenal. I still hate this subject matter, but thanks to you I now have a fighting chance of learning it all.
I already finished all my work about the muscular system, yet I still watched the last 5 minutes. Fun vid!
If this video is helpful to you, please consider supporting our next projects. As a token of our appreciation, we also offer great rewards in return, please check us out here: https://www.patreon.com/AlilaMedicalMedia
Professor can you please explain the functions of muscles associated with injury in relation to action potential and the role of glycogen in this in detail? This 12 min vid was very useful but I don’t know how to answer this question perfectly. please help me prof ��
I cоoооuldn’t bе anyуу haрpier with thе results. I gainееed 12 lbs оf musсlе in 4 wееks. Nоо Speсссiаl Diеt, No Intеnsе EЕEхеrсisе.. https://twitter.com/9b7e19512eee5d182/status/822770372575563776
Amazing explaination with amazing diagrams. Creating a lot of interest in studing. Thank u soooooo…… much. We love u a lot. ��������
If bones are physically moved by muscles, what are physically pulling muscles?
wow just realized hank green has done the same topic video for khan academy n crashcourse but in a totally different way
Excellent artwork, informative and concise. Really great video!!
I really appreciate that
thanks lot
I wish my teachers would teach us like this
“So you can talk or chew chips..” Is actually chewing ships.
You are, the one person, on youtube, who I think could make a very good draw my life video.
I love your videos but, could you maybe talk a little bit slower it’s a lot to digest gotta breath ��
Wow this is so clear! Do you have a video about how muscles grow? Like what happen to the tissues, cells and the other parts of a muscle when the muscle is growing?
Damn you are good at drawing and your teaching………..EXCEPTIONAL
OMG!! this video just saved me from going bonkers!! thank you khan academy!!
its such an awesome video. You made it really simple to understand. Thanks a lot!
how are 2 skeletal muscles connected to each other longitudinally?
if you dudes desire to get ripped much faster without spending a single another minute in the gym, then you have to check out this video tutorial SIXPP.COMDespair is the result of each earnest attempt to go through life with virtue, justice and understanding, and to fulfill their requirements
hey Armando
nyc drawing and u explain the things in the easy way
Thank ���� u so much sir
For very easy explanation of contraction theory
Thank you so much! this was very helpful. best video I have seen yet. THANK YOU!
In all honesty when he described how atp works with the tropomyosin and troponin I felt like it had just answered so many questions I didn’t know I had, it was an odd but exciting feeling and was one of those revealing moments that really seem to deepen my understanding of my own body
Quite possibly the easiest explanation a 20 page chapter in a textbook cant give. THANK YOU!!
brilliant thank you! what happens to the potassium though? just curious.
Thank you so much!! my anatomy lecturer just sent us an archaic video on skeletal muscle and I came searching hoping you had a better one!! You’ve saved me a lot of brain ache!!!
For those who came for Physio: Go to 5:17 the rest is bullshit
A comprehensive tutorial on the anatomy of a muscle cell by Salman Khan.
its Sarcolemma not Sacrolemma, but great video and props on art quality
I enjoy learning from your channels…Your explanations are so clear, thank you SO much!!!
What about muscle tone?? I am really confused can anybody answer please ��
This is absolutely wonderful! Thank you for making it so clear!!
This will definitely make my first physiology exam easier. Thank you so much! Mexico says hi
Am I think only one who is having trouble seeing the video and getting weird unrelated videos instead?!