The digits of the hand are composed of which bones?

The hand's digits are primarily composed of phalanges. Each finger contains three phalanges—proximal, middle, and distal—except for the thumb, which has only two phalanges (proximal and distal). This structure allows for the flexibility and dexterity that are essential for hand function. Phalanges articulate with each other at the interphalangeal joints, enabling the range of motion necessary for various grips and movements.

In contrast, the metacarpals are the long bones in the middle part of the hand that connect the wrist (carpals) to the digits, while carpals are the bones of the wrist itself. The radius, along with the ulna, is one of the forearm bones that connect to the wrist but does not comprise the structure of the digits.