Best Answer: Core: white hot Mantle: red hot to white hot depending on depth (molten lava...) Crust: various shades depending on local composition
An example of a simple synovial joint, e.g. a metacarpophalangeal (finger) joint, is shown above-right. More complicated synovial joints may involve more than two bones, may include sesamoid bones e.g. the patella in the knee joint, may include bursae, and may include accessory ligaments.
Structure of a synovial joint. The bones of synovial joints are held together by ligaments that form a fibrous capsule. The synovial membrane lining the capsule secretes a lubricating fluid, and articular cartilage on the bone ends provides a smooth surface for movement.ypes of joint. Illustrated here are six examples of synovial joints, each of a different type, and one fixed and one semi-movable joint. Synovial joints are classified according to how their articular surfaces (where bones meet) fit together and the movements each permits.