Synovial Joint Essay

A synovial joint also known as diarthrosis, joins bones with a fibrous joint capsule. It is continuous with the periosteum of the joined bones, constitutes the outer boundary of a synovial cavity, and surrounds the bone articular capsule. The articular capsule keeps the bones together structurally, and an inner layer, the synovial membrane, which seals the synovial fluid. Synovial cavity all diarthroses have the characteristic spaces between the bones that is filled with synovial fluid. Joint capsule the fibrous capsule surrounds the diarthrosis and unites the articulating bones. The joint capsule consists of two layers. The outer fibrous membrane that contains ligaments and the inner synovial membrane that secretes the lubricating, shock absorbing,
Bursae saclike structure that are situated strategically to alleviate friction in some joints (shoulder and knees) that are filled with fluid that is similar to synovial fluid.
The blood supply of synovial joint is derived from the arteries sharing in the anastomosis around the joint.
There are six types of synovial joints. Gilding joints, such as carpals of the wrist, these joints allow only gliding or sliding movements. Hinge joints, act as a door hinge does, allowing flexion and extension in just one plane. Pivot joints one bone rotates about another. Condyloid joints two bones fit together with an odd shape these joints allow flexion, extension, abduction, and adduction movements. Saddle joints, which resemble a saddle, permits the same movement as the condyloid joints, but allow greater movement. Ball and socket joints allow all movement except gliding. Compound joints modified hinge joints condylar joints (condyles of the femur join with condyles of tibia) and saddle joint (lower end of femur joins with patella.) The function of the synovial joints are to allow