Question

The bones of a movable joint are lubricated by

Answer 1

Simplest of the freely movable or synovial joints are gliding joints (A), such as those between the carpal bones at the wrist. Movement is restricted by ligaments. Freely movable joints (B) contain fluid to lubricate bearing surfaces (1 bone, 2 cartilage, 3 synovial fluid, 4 synovial membrane, 5 tendon, 6 ligament.)

Answer 2

Synovial fluid (cartilage) is the answer