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How many bones in the adult skeleton
206
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how many bones in the appendicular skeleton?
126
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how many bones in the axial skeleton?
80
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axial:
- skull - 22
- osicles(6)
- hyoid(1)
- sternum - 1
- vertebral column - 26
- ribs - 24
- true (1-7)
- false (8-10)
- floating (11, 12)
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thoracic region:
12 vertebrae T1 - T12
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Lumbar region:
5 vertebrae L1 - L5
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Sacrum:
- 1 sacrum but with 5 fused vertebrae
- S1 - S5
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coccygeal region:
1 coccyx but may be 4 or 5 small fused bones
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upper appendages:
- total bones: 60
- humerus(2)
- radius(2)
- ulna(2)
- carpals(16)
- metacarpals(10)
- phalanges(28)
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lower girdle:
os coxae (2)
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lower appendages:
- total bones: 60
- femur(2)
- tibia(2)
- fibula(2)
- patella(2)
- tarsals(14)
- metatarsals(10)
- phalanges(28)
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what is part of the integumentary system?
hair, nails, skin
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epidermis consist of 5 strata, which are:
- stratum corneum
- stratum lucidum
- stratum granulosum
- stratum spinosum
- stratum basale
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which strata is only found in thick skin?
stratum lucidum
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the hair root is made of the:
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comminuted fracture
- 3 or more peices of bone
- older people
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spiral fracture
common is sports injuries
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depressed fracture
- broken bone portion is pushed inward
- typical skull fracture
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compression fracture
- bone is crushed
- due to extreme trauma
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epiphyseal fracture
- break occurs where the epiphyseal plate is
- occurs whre cartilage cells are dying and calcification of bone matrix is occuring
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greenstick fracture
- common in young children
- bone breaks but not completly, but it is still bent
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