The carpal bones are held together tightly by ligaments, and are more or less fixed in relation to one another. they form two rows: four carpal bones are in the first row closer to the forearm. Two of these, together with the radius from the inferior redioulnar joint which is very important to the movement of the hand. "The ulna is separated from the carpal bones by a cartilage disc. The other joint is located between the two rows of carpal bones. The metacarpus extends from the second row of the carpal bones.
