Home / Series / Crash Course Biology / Aired Order / Season 1 / Episode 31

Big Guns: The Muscular System

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

English
  • Originally Aired August 27, 2012
  • Runtime 15 minutes
  • Network YouTube
  • Created April 8, 2017 by
    Administrator admin
  • Modified April 8, 2017 by
    Administrator admin