Some are anchored to bones within the hand, while others snake their way to the arm. The wrist is a floating cluster of bones and ligaments threaded with blood vessels and nerves. The nerves send ...

It connects the further end of the humerus and the nearest ends of two lower-arm bones: the ulna and radius. The elbow flexes and extends the forearm, and rotates the forearm and wrist.

The forelimbs of the meat-eating raptors took on the task of manipulating prey, and the number of wrist bones shrank to just three. Among those that disappeared was a knobby bone called the pisiform.