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The wrist is a complex joint that bridges the hand to the forearm. It is actually a collection of multiple bones and joints. The bones comprising the wrist include the distal ends of the radius and ulna, 8 carpal bones, and the proximal portions of the 5 metacarpal bones (see the images below).Bones of the wrist, palmar view. Bones of the wrist, enlarged view.he proximal row is found at the level of the distal wrist crease and includes the scaphoid, lunate, triquetrum, and pisiform. The second row of carpal bones, the distal row, is made up of the trapezium, trapezoid, capitate, and hamate; the distal row articulates with the bases of the 5 metacarpal bones.
The hip joint is the ball-and-socket joint made up of the femur (ball) and the acetabulum. Articular cartilage covers the ball (head of the femur) as well as the socket (acetabulum of the pelvis).he hip joint is the ball-and-socket joint made up of the femur (ball) and the acetabulum. Articular cartilage covers the ball (head of the femur) as well as the socket (acetabulum of the pelvis).