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Cards In This Set
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What is another name for joints
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Articulations
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What are joints
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Sites where two or more bones meet
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What is the function of joints
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Give skeleton mobility and hold skeleton together....joints are the weakest point of the skeleton, the more moveable it is, the least stable
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How are joints classified
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By structure (material binding bones together) and by function (amount of movement allowed at joint)
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What are the structural classifications of a joint
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-fibrous...-cartilaginous...-synovial.........synovial joints are the only ones with a joint cavity
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What are the functional classifications of joints
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-synarthroses (immovable)...- amphiarthroses (slightly movable) .......-diarthroses (freely movable)
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What are some facts about fibrous joints
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-bones joined by dense fibrous connective tissue....-no joint cavity...-most are immovable...-movement depends on length of CT....all are synarthrotic
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What are the 3 types of fibrous joints
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- suture (synostoses - all sutures are fused).....- syndesmoses (connected by ligament) .....-gomphoses
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What are some facts about cartilaginous joints
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-bones united by cartilage...-no joint cavity...-not highly movable
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What are the 2 types of cartilaginous joints
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-synchondroses (hyaline) , all are synarthrotic, ex: epiphyseal plate and the 1st costal cartilage....-symphyses (fibrocartilage), amphiarthrotic, Ex: intervertebral discs and pubic symphysis
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What are some facts about synovial joints
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-bones are separated by fluid filled joint cavity....-all are diarthrotic...-include almost all limb joints
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What are the general features of a synovial joint (6)
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1 articular cartilage (hyaline cartilage covers bone surface)........2. joint cavity (a space that contains a sml amount of synovial fluid, unique only to synovial joints) .....3. articular capsule .... 4. synovial fluid......5. reinforcing ligaments....6. nerves and blood vessels
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What are the different range of motions allowed by synovial joints
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-nonaxial (slipping movement)....-uniaxial (movement in one plane)....-biaxial (movement in 2 planes).....-multiaxial (movement in all 3 planes)
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What are the 3 general types of movement allowed by synovial joints
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-gliding.....- angular .......-rotation
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What is gliding movements
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-one flat bone surface glides or slips over another similar surface......ex: intercarpal joints, intertarsal joint
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