JOINTS - PowerPoint PPT Presentation

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JOINTS

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  1. JOINTS FIBROUS JOINTS • Lie between bones that closely contact one another. • Thin layer of dense connective tissue joints the bones. • Suture (skull) • Joint in leg between tibia and fibula (distal end)

  2. CARTILAGINOUS JOINTS • Hyaline cartilage connect bones. • Joints of vertebral column • Intervertebral disc: fibrocartilage surrounding a pulpy or gelatinous core. • Absorbs shocks and helps equalize pressure between adjacent vertebrae when the body moves.

  3. SYNOVIAL JOINTS • Most joints are these type. • Allow free movement. • Complex structurally than fibrous or cartilaginous • Articular ends covered with hyaline cartilage. (articular cartilage) surrounded by a tubular capsule of dense connective tissue.

  4. Joint capsule: composed of an outer layer of ligaments and an outer layer of ligaments and an inner lining of synovial membrane (secretes synovial fluid). • Synovial fluid: lubricates joints. • Menisci: flattened pads of fibrocartilage, shock-absorber. Between the articulating surfaces of the bones.

  5. bursae: fluid-filled sacs. • Located between tendons and underlying bony prominences. • Aid movement of tendons that glide over these bony parts or other tendons.

  6. BALL-AND-SOCKET JOINT • Bone with a ball-shaped head that articulates with the cup-shaped cavity of another bone. • Wider range of motion • Movements in all planes. Ex. Shoulder and hip