ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Shoulder. Coloured X-ray of a healthy shoulder joint. The top (lower right) of the upper arm bone (humerus) fits into the socket (centre left) of the shoulder blade (scapula) to make a ball-and- socket joint. Above these is part of the collarbone (clavicle, upper left) that supports the arm. The shoulder joint allows rotation and movement in any direction, unlike the hinge joints of the knees and elbows.
Model release not required. Property release not required.