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12 Cards in this Set
- Front
- Back
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the skeleton: two divisions
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the axial skeleton
the appendicular skeleton |
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the skeletal system includes what
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joints, cartilages, ligaments
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functions of the bones
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supports
protection movement storage blood cell formation |
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how many bones in an adult skeleton
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206 bones
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what are the two basic types of bones
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compact bone
spongy bone |
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describe compact bone
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is dense and looks smooth and homogeneous
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describe spongy bone
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is composed of small needlelike piesces of bone and losts of open spaces (poreous)
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bones are classified according to shapes, name the four groups
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long, short, flat, and irregular
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long bones are:
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are typically longer than they are wide
mostly consist of compact bone ex: limbs |
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short bones are:
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generally cube-shaped
consist mostly of spongy bone ex: wrist and ankles bones, ex: sesamoid bones- patella, kneecap |
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flat bones are:
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thin, flattened and usually curved
consist two thin layers of compact bone sandwhiching a layer of spongy bone between ex: ribs, skull, and sternum (breastbone) |
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irregular bones are:
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bones that do not fit one of the catoregories
ex: veretebrae, and the hip bones |
