Which part of the hand does the thumb have fewer phalanges than the fingers?

The thumb has fewer phalanges than the fingers because it consists of only two phalanges, known as the proximal and distal phalanges. This is in contrast to the other fingers, which each comprise three phalanges: proximal, middle, and distal. This unique structure allows the thumb to perform a wide range of motions and provides a greater degree of opposition and grip, which are essential for functioning in daily activities. Understanding the anatomy of the hand helps in recognizing how the lever systems work in grasping and manipulating objects, where the distinct number of phalanges plays a crucial role.