Freely movable joint

Bursae

sacks of synovial fluid

Diarthrotic

freely movable joints bound together by a fibrous articular capsule

ball-in-socket joint

allow angular movement in all directions

condyloid joint

allow movement in 2 planes. Formed by rounded articulation with an elliptical depression

pivot joint

allow rotational movement around one point

hinge joint

allows movement in one plane

Synovial membrane

lines the inside of the capsule and secretes synovial fluid to lubricate the joint

Gliding joints

occurs between small bones with flat or slightly convex surfaces.

saddle joint

where both ends of bones are saddle shaped, convex in one direction and concave in the other