Transcription of Skeletal System Skeletal Anatom y
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Skeletal System Skeletal Anatom y
Human Anatomy & Physiology: Skeletal System ; Ziser, Lecture Notes, Systembones, cartilage and ligaments are tightly joined toform a strong, flexible frameworkbone is active tissue:!5-7% bone mass/weekFunctions of Skeletal System :1. Supportstrong and relatively light; 20% body weight2. Movementframework on which muscles actact as levers and pivots3. Protectionbrain, lungs, heart, reproductive system4. Mineral storage (electrolyte balance99% of body s calcium is in bone tissue(1200-1400g vs < in blood, rest in cells)also stores phosphate5. Hemopoiesisblood cell formation6. Detoxificationbone tissue removes heavy metals and other foreign materialsfrom bloodcan later release these materials more slowly for excretionbut this can also have bad consequencesHuman Anatomy & Physiology: Skeletal System ; Ziser, Lecture Notes, Anatomyeach individual bone is a separate organ of theskeletal System ~270 bones (organs) of the Skeletal Systemwith age the number decreases as bones fuseby adulthood the number is 206 (typical)even this number varies due to varying numbersof minor bones:sesamoid bones small rounded bones that form withintendons in response to stresseg.)
4. M ineral storage (electrolyte balance 99% of bodyÕs calcium is in bone tissue (1200-1400g vs <1.5g in blood, rest in cells) also stores phosphate 5. H em opoiesis blood cell form ation 6. D etoxification bone tissue rem oves heavy m etals and other foreign m aterials from blood can later release these m aterials m ore slow ly for excretion
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