NATURAL SCIENCE INPUT 10: THE MUSCULOSKELETAL SYSTEMA - MULSCLES

INPUT 10 

VIDEO: https://www.youtube.com/watch?v=UGSi_HwgX0k&t=2s

VIDEO:  https://www.youtube.com/watch?v=0PyDEna7qs0

VIDEO:   https://www.youtube.com/watch?v=Vnj9Ay6xmOk

VIDEO:    https://www.youtube.com/watch?v=OSsntU6sTWI

OUTPUT 10