The second metacarpal is one of the five long bones in the hand, located between the wrist and the fingers. It connects to the index finger, also known as the second digit, and plays a crucial role in hand movement and grip. This bone is positioned next to the first metacarpal, which connects to the thumb. Anatomically, the second metacarpal is characterized by a base, shaft, and head. The base articulates with the carpal bones of the wrist, while the head connects to the proximal phalanx of the index finger. Its structure allows for flexibility and strength, essential for various hand functions.