What is the shape of the phalanges?

The phalanges are long, slender bones that are generally tubular in shape. They consist of three parts in each finger and toe—proximal, middle, and distal phalanx—except for the thumb and big toe, which have only two. Each phalanx has a rounded head at one end for articulation with adjacent bones and a flattened base at the other end. This structure allows for flexibility and movement in the fingers and toes.