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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.
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3 Main Types of Joints FIBROUS
bound tightly together by connective tissue and allow no movement. Example: Sutures
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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.
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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
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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
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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
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TYPES OF SYNOVIAL JOINTS
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JOINTS OF THE HUMAN BODY
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JOINTS OF THE HUMAN BODY
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JOINTS CONT’D
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TYPES OF JOINT CONT’D
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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
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TYPES OF SYNOVIAL JOINTS
WORKSHEET TYPES OF SYNOVIAL JOINTS
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