ANATOMY

Detailed explanation-1: -Synovial joints are the only joints that have a space between the adjoining bones (Figure 19.25). This space is referred to as the synovial (or joint) cavity and is filled with synovial fluid. Synovial fluid lubricates the joint, reducing friction between the bones and allowing for greater movement.

Detailed explanation-2: -Joints are held together and supported by tough bands of connective tissue called ligaments. Smooth cartilage prevents friction as the bones move against one another.

Detailed explanation-3: -Synovial joints share important structural components: subchondral bone, hyaline cartilage, a joint cavity, synovial lining, articular capsule, and supporting ligaments.

Detailed explanation-4: -Gliding joints: only allow sliding movement. Hinge joints: allow flexion and extension in one plane. Pivot joints: allow bone rotation about another bone. Condyloid joints: perform flexion, extension, abduction, and adduction movements.