Skin
Added 2022-08-06 14:47:56 +0000 UTCA big chunk of stylization (as far as line is concerned in this post at least) of the body comes from picking and choosing what parts of the muscle structure you want to allow to show through skin. The amount of muscle/fat an individual has plays a major role in the visibility of the structure through skin, though commonalities like the separation of the brachioradialis and pronator/flexors generally carry over regardless.
Images like these can serve as a jumping off point for your own picking and choosing of lines to keep and lines to discard.
