BI13_Ch8 PP Slides

BI13_Ch8 PP Slides - Joints Chapter 8 Goals Be able to...

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Joints Chapter 8
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Goals • Be able to classify joints based on function and structure • Describe and give examples of fibrous, cartilaginous, and synovial joints • Know the different classification of joint movement • Be able to describe the 6 classes of synovial joints • Joint injuries and diseases
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Classification of Joints Definition and Function of Joints Functional Classifications Structural Classifications
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Articulations Joint = Articulation Place where two bones meet Function of joints 1. Give skeleton mobility 2. Hold skeleton together Articulations are the weakest parts of the skeleton Still can resist many forces
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Classification of Joints Definition and Function of Joints Functional Classifications Structural Classifications
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Functional Classifications • Classify based on how much movement – Synarthroses • Immovable • Typically on axial skeleton – Amphiarthroses • Slightly moveable • Typically on axial skeleton – Diarthroses • Freely movable • Typically on limbs
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Classification of Joints Definition and Function of Joints Functional Classifications Structural Classifications
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Structural Classifications • Classify based on material binding bones together – Fibrous • Bones joined by collagen fibers – Cartilaginous • Bones joined by cartilage – Synovial • Joint lined with synovial membrane • We will examine by structural classification
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Three Basic Joints Fibrous Joints Cartilaginous Joints Synovial Joints
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Characteristics of Fibrous Joints • Bones are joined by fibrous tissue • No joint cavity present • Most are synarthroses – Immovable • A few are amphiarthroses – Slight movement
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Sutures • Only occur between bones of skull • Space between bones filled with short connective tissue fibers • Syntoses – Fibrous tissue ossifies – Occurs in middle age – Protects the brain
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Syndesmosomes Bones are connected by a ligament – Cord of fibrous tissue connecting bones Vary in length – Longer fibers allow more movement – Still classified as synarthroses Examples: – Distal tibiofibular joint – Interosseous membrane connecting radius and ulna
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Gomphoses • “Peg in socket” fibrous joint • Only example in humans is a tooth in alveolar socket – Periodontal ligament
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Three Basic Joints Fibrous Joints Cartilaginous Joints Synovial Joints
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Characteristics of Cartilaginous Joints • Bones are joined by cartilage • No joint cavity present • Two types of cartilaginous joints – Synchondroses – Symphyses
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Synchondroses • Bones are connected by a bar or plate of hyaline cartilage • Virtually all are synchondroses • Examples – Epiphyseal plate in growing long bones – 1 st sternocostal joint
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This note was uploaded on 08/12/2009 for the course BI 13 taught by Professor Alexasawa,ph.d during the Spring '09 term at College of the Desert.

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BI13_Ch8 PP Slides - Joints Chapter 8 Goals Be able to...

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