I am not sure if this would help you or not…. I hope it make sense though!
I would suggest you to look at the anatomy book for reference. how the muscles were places would help you understand the shape and how it connects together more.
I would have write it down too but I am not and expert I am afraid I might get it wrong for you….
Title: Mega Man 2 Medley
Artist: Takashi Tateishi, Manami Matsumae, Rio Hamamoto
Super Smash Bros. for 3DS & Wii U | Mega Man 2 Medley (Compiled Audio)