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.
Synovial joints are the most common and most moveable type of joint in the body. A synovial joint is also known as a diarthrosis, which means a joint with two separate bones, because in synovial joints, the bones are not directly connected to each other at all.