I think a more accurate term for this peice would be - Torso. That's just me nit-picking. Overall you did a pretty damn good tutorial. Here's some additional terms you could use in the future. Don't forget the yummy obliques!! That little muscle you're showing that extends and flattens when the arm is raised is called the 'latissimus dorsi' or as body building like to call them 'lats' for short. Also the muscle that connects with the collar bone is called 'sternomastoid'. And those sexy neck muscles that hold upthe head: 'trapezuis'.
Torso! That's the word! Man I have the worst memory and the word was right there and for some reason I just couldn't rememebr what it was.Does that ever happen to you?? Silly me oh well. Yeah and about all the muscles I didn't want to get too specific with it...and it was at one in the morning when I was drawing it and I didn't want to write all those long complicated words when I was half awake anyway thanks for the heads up though next time I do a tutorial I'll be sure to add those.