Nice Abs. Poor guy needs some shoulders, though. Seriously, the anatomy on the shoulders is way off. His “pects” or chest muscles are supposed to connect to the upper arm bone, to move it forward (imagine bench pressing). That triangular shape from the waist to the arms seen in bodybuilder front views is actually back muscles, the lats, that pull the arms down. The delts run over the top of the upper arm bone, and pull the arm up.
All three of these major muscle groups, visible on the surface, connect to the upper arm bone around where you’ve got the great swelling. The form should be moving in toward the bone, not out and away from it.
He’s going to need a rib cage, too. Something for those abs to attach to.
Take a look at this guy’s pects. See how they are heading up to his right arm and over to his left arm?
This gent shows the arch of his rib cage, and his left lat is evident, coming from the back and attaching to the arm.
Notice the delt on his left arm, almost coming to a point where the mucles narrow in to attach to the arm bone. You can see some of his left lat, too, coming from the spine and going under
the delt to attach to the arm.