Skeletal System Vocab
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| skeletal system | system made up of 206 bones that has several functions
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| joint | place where two bones meet
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| hinge joint | allows one direction movement (elbow)
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| ball and socket joint | allows circular movement (shoulder)
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| gliding joint | allows partial movement (wrist)
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| pivot joint | allows up, down, side to side movement (head)
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| slightly movable joint | limited movement (vertebrae)
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| immovable joint | doesn't allow any movement (skull)
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| osteoporosis | brittle bones caused by a lack of calcium
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| dislocation | bone that is pushed out of a joint
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| arthritis | painful swelling of the joints, caused by wearing away of cartilage
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| fracture | a break in a bone
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| osteoblasts | bone forming cells that replace cartilage
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| osteoclasts | cells that break down bone and release calcium and phosphorus in the bloodstream
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| functions of the skeletal system | protect organs, stores minerals, provides support, allows movement, produces red blood cells
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| calcium | stored in bones and important for muscle contraction and proper functioning, builds strong bones
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| phosphorus | stored in bones and helps in energy production
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| axial skeleton | bones that support and protect the organs of the head, neck, and trunk
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| appendicular skeleton | composed of bones that anchor the appendages of the body to the rest
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| periosteum | outer membrane of bone that covers it, blood vessels and nerves can enter
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| compact bone | hard, weight bearing part of bone that is strong because of tight bone cells
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| spongy bone | strong but light-weight part of bone that is porous and found at the end of bone
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| marrow | soft, fatty tissue found in the center of bone where blood cells are produced
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| ligaments | elastic fibers which holds bones together
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| tendons | connective tissue that joins muscles to bones
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| cartilage | hard and flexible tissue that is in between bones, ears and nose, baby's are mostly this when born
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