Anatomy of a muscle cell

[sonicheroin]

i have a feeling future students are going to learn tubes inside the myosin and actin filaments

[MrGREENQUESO]

I had to rewind the last 3 minutes a few times. Lots of information - thanks for clarifying that whole action potential deal...

[7StepzUnderTheSun]

THANK YOU,,,, And yes I'm shouting this out! :D

[Nuswa22]

I can not explain the worth of your videos to my academic life, and indirectly. my future life. Thank You :)

[untraveled]

I love you man.

[glamourgirl150]

u saved my life

and this isnt the first time :)

[Zanco]

You sir are a great man. 

[rcasciato]

I am a massage instructor, and teaching the sliding filament theory in A&P was really difficult for me the first time I did it. Getting ready to teach this again, and am thrilled I found this video (and your other ones) - nothing I have seen (and last year I was looking everywhere) comes close to this video as far as clarity and completeness. This is just excellent, and I thank you for posting it!

[sambiche696]

yes it was "mildly useful"

you deserve more

[Do0odiie]

You're a real hero!

[holajose2]

Wait...what are the Z-bands and M-bands made up of? Not important?

[AlwaysScaredShitless]

Just saved me 7 pages worth of reading. Thank you! :D

[makeiteasyable]

brilliant

[itsmyturnsolisten]

i completely agree with underxman u deserve a nobel prize

also u helped me learn the meaning of a true genius=)

[itsmyturnsolisten]

u r an angel, sal i wish my teacher taught this stuff like u do

thx ur awesome =)

[Task5003]

Great video, just one thing: IMO this video should've come BEFORE the video on tropomyosin and troponin - it would've been a bit easier to follow then, for me anyway. <3

[soleloneguy]

this guy has a phd in every discipline

[hcoopo]

What the hell did you major in?

[albertj32091]

if all teachers taught like you do, we'd be chilling on mars by now

[789123Y]

@albertj32091 And we would have fusion energy, stem cells sold on drugstores, and we could take vacations on Moon.

[ivoryjacks]

i watch these vids over and over, such a great reference!

[AAHassan92]

Mildly useful? That was plenty useful :)

[AKGTCC]

I have to agree with viruspirate, and aeid21 you sir are a God send. Thank you :)

[Viruspirate]

i think i love you

[aeid21]

i hope you are a millionaire sir. cause your teachings are priceless.

[lindybindyify]

This guy is my new hero.

[chevans004]

Thxxxxxx, so much!!! This was so usefull... I missed class when my teacher went over this. So when i went over my classmates notes i was like.. ?#¿*¿?.. wtf... Thx :0)

[MrDavidX96]

haha, a joke about bieber, and the dislike bar that's NOT dirty: see the dislike bar? that's how big bieber's muscles are! ha it's not even sugestive.

[MrDavidX96]

thnx i couldn't find out what the name of the stupid myofibril

[neha0209]

OMG!!...so well illustrated!!...i understood each n evry word..thnx a lot!!

[kamoljon]

thanks for your tutoring! very helpful!

[s2dreaming]

OMG!!!

I spend an hour scrambling through my anatomy textbook trying to understand this

when this 16 minute video is SO much easier to understand lol

[willydogg9]

really good!

[MrDerogative]

MY MIND

I CAN SEE EVERYTHING SO CLEARLY

[wr871]

Thank you, I finally get it!!!!!

[Diosconnosotros1]

Thank you soo much, this video help me in my understand anatomy and physiology clas

[arealace77]

this... is.. more than mildly useful... definitely more than that.

[Shauno19882010baby]

Thankyou sir, your lessons are so elementry for me to understand.

Im curiouse you wouldnt have a big file with all you tutorials on Chem and Bio to put on iso hunt at all? lol just a sugestion.

Thanks again.

[0ElectricWizard]

Could you upload a tissue differentiation video? Alternately, feel free to redirect me to a video that gives a comprehensive description of the process of tissue differentiation, thanks. 

[inakue]

This is for what youtube is really helpful!

[RozenFaith]

I Bands? Steve job is once a scientist?

[Underxman]

Damn this is good. Thanks. You deserve a nobel price for this!

[brentilda25]

@Underxman prize?

[llamallama2007]

Thank you! Teachers have just told me about actin and myosin and to be honest i had no idea where they were in the muscle, this video really puts it into perspective!

[Exatross]

You, sir, are a genius.

[Sandrahendersonable]

very helpful, thank you



[russonkevin]

perfect timing, just staring muscles in my class and needed some help understanding this.

[roderik17]

Excellent video! have one question though.

what kind of drawing programme do you use?

[titogradoss]

Excellent, thanks !!!!!! excuse me.. how do you do to draw while you are making the class?? 

[mommytash89]

WOW!

[sleep1937]

"mildly useful"???

that was great! thank you so much!

[nMcSabith]

is there any cytoplasm in the cell?

[hiimbong]

@nMcSabith

yes, but it's called sarcoplasm.

[Matteo1124]

how dose the bodies take back the Ca back when the musscle relaxs

[Y3ahokay]

@Matteo1124 Once the neuron stops stimulating the T-tubules, the sarcoplasmic reticulum reclaims the Ca+ and it detaches from the troponin. With the Ca+ gone, the tropomyosin moves back to its original position where it coveres the active sites of the actin so the myosin heads can no longer bind. This causes the muscle to relax.

[koniginator]

nuclei nuclei NUCLEI

[qcages]

I think it's funny how he say "i hope you've found this mildly useful" at the end. THIS IS INCREDIBLY USEFUL AND EXTREMELY HELPFUL. Thank you <3.

[odaymustdie]

The real I-band is in fact double what you highlighted.  The I-band sandwiches the Z-line.

[porkrolleggNcheese1]

thanks a ton! really helped me understand a muscle cell compared to my bio textbook. Great drawings!

[DMFuenzy]

gracias amigo!

[DMFuenzy]

awesome, thank you so much. your videos are really helpful!!!

gracias amigo!

[Oozinaty]

I wish you were teaching my class.... VERY VERY VERY helpful. And artistic.  (-:

[abidsaleem87]

thanks! now i know the meaning of what i actually wanted to know.. ur drawings are really helpful..

[abidsaleem87]

thanks! now i know the meaning of what i actually wanted to know..

[sibghatullahdad]

O.M.G I M SO GLAD THAT I SUBSCRIBED TO KHANACADEMY AND YOU R REALLY WORTH PRAISE WELL I DONT PRAISE ANYONE BUT YOU R JUST WORTH................. SIR U R MY BIOLOGY PROFESSORS NOW LIKE EM FROM SOUTH-ASIA PAKISTAAN IN SINDH HYDERABAD IN SUPERIOR COLLEGE OF SCIENCE AND U DID GOT THINGS IN MY MIND WAT MY MA'AM DIDN'T LIKE YOU ROCK U TUBE................. MAN................ LIKE ITS A GOOD DAY DAY TO ME...............12-10-2010

:) ;)

[2013rdh]

Great explanations! It helps to see how the layers all come together as you draw & label everything.....makes it a lot easier to retain the info......thanks so much!!!! I will definitley study from your videos from now on!!

[azm1987]

I <3 khan

[smartchoices11]

I work out and Im a legal guy by education. You are amazing and make complex functions easy to understand. This is better than  a movie and is so interesting.

[yujinwu]

Thank you so much, now I understand.

[berniemac18]

love u man. I will donate to ya ass soon as i get some cash

[lvecsey]

kind of a mind trip to think of that all happening, body wide

or that some of it is triggered from neuron activity from your spine as a reaction (or trained, repetitive action) without even being fully conscious of it. in a way your conscious mind can study what the body is doing and fill in the remaining sense of it all.

[MattLei09]

:D i have an anatomy exam fri thanks so much

[xcelpast]

that a buffed up guy yuo're drawing lol

[88think]

I like your new graphics program man... biggg improvement!!

[norwayte]

Excellent. To draw everything - to see it step by step becoming... better than one picture at once and than explaining it. Pictures at once are distracting. Keep on going.

[andreiduffy]

brilliantly illustrated ;-)