Big Guns: The Muscular System — CrashCourse Biology #31

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Hank tells us the story of the complicated chemical dance that allows our skeletal muscles to contract and relax.

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Table of Contents
1) Cardiac, Smooth, & Skeletal Muscles 01:09
2) Muscle Anatomy 02:03
a) Muscle Fibers 03:07
b) Myofibrils 04:15:1
c) Sarcomeres 04:19:1
d) Myofilaments 04:37:2
3) Biolography 05:37:1
4) Sliding Filament Model 07:47

References for this episode can be found in the Google document here:

crash course, crashcourse, biology, muscular system, muscle, cellular respiration, energy, ATP, human body, chemistry, cardiac muscle, smooth muscle, skeletal muscle, contract, relax, tendon, anatomy, physiology, fascicle, fibers, protein, myofibril, sarcomere, myofilament, actin, myosin, sliding filament model, biolography, electron microscope, tropomyosin, troponin, sarcoplasmic reticulum, motor neuron Support CrashCourse on Subbable:

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  1. ph sriyalatha

    what about the boundaries of muzzle fibrin like A boundry

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  2. Cena Nohn

    dude!! too much assassin's creed

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  3. Carolyn Glaubensklee

    Are you still making these videos HanK?

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  4. Jonette Kruk

    Thank you so much for your videos. They are so much help! I like the way you compare processes of the body with other scenarios.

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  5. Megan Gurney

    Made so much more sense than the 4 times my instructor went over it in class. Thank you!

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  6. Justin Weng

    "pent up frustration" "groping" this dude is really thirsty amirite lmao

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  7. Paolo Chizzolini

    I сouldn't be аnу hарpiеr with thе results. I gainеd 12 lbs of musсlе in 4 wееks . Nо Sрррeсial Diеt, No Intense Ехеrсise.. https://twitter.com/9b7e19512eee5d182/status/822770372575563776

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  8. Andy Claw

    Why don't you eat the chicken? 3:27

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  9. Fhaegg Ggidd

    make a video about types of tissues

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  10. Sophie Johnson

    WOOOO! Assassin's creed!

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  11. Caryn O'Sullivan

    Thank you for taking something complicated and making it understandable and humorous.

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  12. MiškaMyša Vráželová

    Almost the same episode as the new one but still worth watching.

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  13. fandomtrash

    Hank saved me once again from failing my biology test ?

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  14. Anastasia J

    Were you on Cyberchase?

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  15. Мария Георгиева

    Now I feel really guilty doing any unnecessary movements, wtf 😀

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  16. Katherine Zhao

    Thank you so much for this awesome episode!!! And the result that I got was also fantastic! The first time I got 100% in my Biology assessment!!! Thanks again for crash course!!! Keep on doing it!!!

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  17. NATHAN TODZY

    I am a middle school student and that was offensive. 5:20

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  18. Katherine Pierce

    Your video game muscles ?

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  19. Tatiana Illis

    I accidently clicked this video and then stopped it at 0:03
    I've never laughed so hard xD

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  20. toinfinityandpandas

    You have no idea how appreciative I am of this channel. It's helped me go through A&P, Microbio, Bio l and now finally…bio ll ? you guys are a godsend

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  21. sour

    u remember the goof ol' days when hank taught us instead of "new hosts" on pbs digital learning

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  22. Yorlenis Meneses

    you are freaking also i love it

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  23. Shona Cole

    he makes it so easy to understand-I thank you for that

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  24. George Garvey

    The knowledge was known, centuries before the Huxley family. We've been told so many lies. "Brave New World: Revisited." Is becoming a reality.

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  25. Shona Cole

    love him he has helped me more then you know-thank you

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  26. Pranav Chandran

    THIS IS THE BEST

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  27. Leticia Munoz

    awesome

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  28. Christopher R. Helou Decos

    I laughed when Hank said "because of chemistry" because the title says CrashCourse Biology  🙂

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  29. crimson

    hmmmm this rwminded me of hydoulics so i had an idea of doing some research on making a muscle substitute…then i though of boilagy but the cells would die out then i got the idea of tampering with those cells that keep your cells alive…..then zombie apocalypse came into my head…..i said nope and gave up on that on the spot….oh amd im 13

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  30. Melissa La Locaaa

    1:33 thickkk

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  31. Aenaon Rodriguez

    trash

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  32. greg77389

    Where did Hank find that stunt double to work out for him?

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  33. Garrett Huckabay

    how do muscles get built after excercise?

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  34. AK Sadaram

    Human body so complicated yet works flawless

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  35. Глеб Ворончихин

    why does calcium unbind from troponin?

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  36. Julia Newberry

    I have been struggling to understand this for over a week, and you managed to explain it clearly in 12 minutes. Well done. Very well done.

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  37. Shelby Longbottom

    Biden: Ananussayswhat
    Trump: "What?"

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  38. Kylie Marsh

    Ty

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  39. Monkey D. Luffy

    I love you guys so much. Bless

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  40. Angelita Wilson

    🙂

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