How many phalanges does the thumb have?

The thumb has a total of two phalanges, which are the bones that make up the digits of the hand. Specifically, the thumb consists of a proximal phalanx and a distal phalanx. This is distinct from the other fingers, each of which contains three phalanges: a proximal, a middle, and a distal phalanx. The unique structure of the thumb, with its two phalanges, allows for a greater range of motion and contributes to its opposable nature, which is essential for gripping and manipulating objects. This anatomical feature plays a critical role in making the thumb functionally important in hand movements and dexterity.