The phalanges are the bones of the digits (Fig. 7.94):
The thumb has two—a proximal and a distal phalanx.
The rest of the digits have three—a proximal, a middle, and a distal phalanx.
Each phalanx has a base, a shaft (body), and distally, a head.
The base of each proximal phalanx articulates with the head of the related metacarpal bone.