JOINT MECHANICS & JOINT INJURIES

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Presentation transcript:

JOINT MECHANICS & JOINT INJURIES Joints are the points of contact (articulation) between two bones. Joints hold bone together Allows for flexibility and movement Examples of joints in our body: elbows, knuckles, shoulders, ankles, etc.

3 Main Types of Joints FIBROUS bound tightly together by connective tissue and allow no movement. Example: Sutures

3 Main Types of Joints CARTILAGINOUS the body of one bone connects to the body of another by means of cartilage, slight movement is possible. Example: Intervertebral “discs” of spinal cord.

3 Main Types of Joints SYNOVIAL bony surfaces are separated by a lubricating fluid (the synovia) and by cartilage. They are also joined by ligaments. Allows the most movement. Example: knee, shoulder, ankle

The Characteristics of a Synovial Joint Bone Blood vessels Nerve Joint cavity Synovial membrane Joint capsule Fibrous capsule Articular cartilage Bursa Tendon sheath Membranous layer Periosteum Tendon Fibrous layer

CHARACTERISTICS OF SYNOVIAL JOINTS Articulating cartilage protects ends of bone and allows for smooth contact, shock absorber Joint capsule fibrous structure made up of synovial membrane (allows certain nutrients to pass through) and fibrous capsule (keeps synovial fluid from leaking) Joint cavity filled with synovial fluid, prevents friction and provides nutrients Bursae (bursa) small, flattened fluid sacs, found between friction points b/w tendons, ligaments and bones

TYPES OF SYNOVIAL JOINTS

JOINTS OF THE HUMAN BODY

JOINTS OF THE HUMAN BODY

JOINTS CONT’D

TYPES OF JOINT CONT’D http://www.youtube.com/watch?v=zWo9-3GJpr8

Tissue Properties Tendons: Composed of collagen (bundles of white, fibrous protein) Attach muscle to bone Vascular Ligaments: Tough bands of white, fibrous tissue Attach bone to bone Avascular

TYPES OF SYNOVIAL JOINTS WORKSHEET TYPES OF SYNOVIAL JOINTS

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