Just trying out some arm anatomy practice and I'm so proud of it! Take a look:
So, what I did here was, first, take a picture of the entire arm anatomy. Second, I simplified the arm into balls and cylinders (the gray shapes) whilst making sure to add some guidelines to make it more consistent and easier to draw. Third and lastly, I drew around the guidelines to make this wonderous piece!
So far, this is for the front view of the arm (by itself), so I don't know if the simplified arm (the gray shapes) might be consistent entirely with drawing the arm at some specific angles, but it's a start, I guess.