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12 Cards in this Set

  • Front
  • Back
the skeleton: two divisions
the axial skeleton
the appendicular skeleton
the skeletal system includes what
joints, cartilages, ligaments
functions of the bones
blood cell formation
how many bones in an adult skeleton
206 bones
what are the two basic types of bones
compact bone
spongy bone
describe compact bone
is dense and looks smooth and homogeneous
describe spongy bone
is composed of small needlelike piesces of bone and losts of open spaces (poreous)
bones are classified according to shapes, name the four groups
long, short, flat, and irregular
long bones are:
are typically longer than they are wide
mostly consist of compact bone
ex: limbs
short bones are:
generally cube-shaped
consist mostly of spongy bone

ex: wrist and ankles bones,
ex: sesamoid bones- patella, kneecap
flat bones are:
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)
irregular bones are:
bones that do not fit one of the catoregories
ex: veretebrae, and the hip bones