The human forelimb consists of two parts: the lower limb and hand.The hand is made up of three sets of bones: the carpals,the metacarpals and the phalanges that make up the five digits.The two bones of the lower forelimb are called the radius and the ulna.The small bones which make up the carpus are called carpals.The five cylindrical bones which make up the metacarpus are called metacarpals.The five sets of small cylindrical bones which makes up the digits are called phalanges.The five sets of phalanges consist of small cylindrical bones which articulate proximally with the metacarpals. Our forearm contains two long, parallel bones: the ulna and the radius. The ulna is the longer and larger of the two bones, residing on the medial (pinky finger) side of the forearm. It is widest at its proximal end and narrows considerably at its distal end. At its proximal end, the ulna forms the hinge of the elbow joint with the humerus. The end of the ulna, known as the olecranon, extends past the humerus and forms the bony tip of the elbow. At its distal end, the ulna forms the wrist joint with the radius and the carpals.