CONNECTION made between bones in the body which link the skeletal system into a functional whole.They are constructed to allow for different degrees and types of movement.Joints are classified both structurally and functionally.Joints are the points of the body where two bones meet.There is OFTEN MOVE between them but sometimes there is not. A joint has two main functions: to allow mobility of the skeletal system and to provide a protective enclosure for vital organs.The MUSCLES and ligaments that surround the joint are also some of the LARGEST and strongest in the body.Synarthroses are immovable joints.The singular form is synarthrosis. In these joints, the bones come in very close contact and are separated only by a thin layer of fibrous connective tissue.