Question

an example of a ball - and - socket joint in the human skeleton is found between the ulna and the humerus. the femur and the tibia. the radius and the ulna. the humerus and the scapula. the radius and the metacarpals.

Explanation:

A ball - and - socket joint allows for multi - directional movement. The joint between the humerus (upper arm bone) and the scapula (shoulder blade) is a ball - and - socket joint. The head of the humerus (ball - like structure) fits into the glenoid cavity of the scapula (socket - like structure). The other pairs mentioned do not form ball - and - socket joints. The ulna and humerus form a hinge joint, the femur and tibia form a condyloid joint, the radius and ulna have a pivot joint, and the radius and metacarpals do not form a ball - and - socket joint.

Answer:

the humerus and the scapula.