Find the page showing the elbow in flexion . Note the three heads of the triceps fanning out above the olecranon. Add that fan shape.
The arm and hand are complex systems made up of bones, muscles, tendons, and ligaments that work together to facilitate movement and function. The arm is composed of three bones: the humerus (upper arm), radius and ulna (forearm). The hand is made up of 27 bones, including the carpals (wrist), metacarpals (hand), and phalanges (fingers). arm and hand in motion by anatomy for sculptors pdf full