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Anatomy sem 1
Skeletal system
Term | Definition |
---|---|
articular cartilage | dense, white, connective tissue that covers the articulating surfaces of bones at joints |
cortical bone | dense, solid bone that covers the outer surface of all bones and is the main form of bone tissue in the long bones |
trabecular bone | interior, spongy bone with a porous, honeycomb structure |
diaphysis | the shaft of a long bone |
epiphysis | the bulbous end of a long bone |
medullary cavity | central hollow in the long bones |
ossifi cation | process of bone formation |
osteoblasts | specialized bone cells that build new bone tissue |
osteoclasts | specialized bone cells that resorb bone tissue |
osteocytes | mature bone cells |
periosteum | fibrous connective tissue membrane that surrounds and protects the shaft (diaphysis) of long bones |
remodeling | process through which adult bone can change in density, strength, and sometimes shape |
hematopoiesis | process of blood cell formation |
axial skeleton | central, stable portion of the skeletal system, consisting of the skull, spinal column, and thoracic cage |
cervical region | the first 7 vertebrae, comprising the neck |
atlas | the first cervical vertebra; specialized to provide the connection between the occipital bone of the skull and the spinal column |
axis | the second cervical vertebra; specialized with an upward projection called the odontoid process, on which the atlas rotates |
thoracic cage | bony structure surrounding the heart and lungs in the thoracic cavity; composed of the ribs, sternum, and thoracic vertebrae |
thoracic region | the 12 vertebrae in the middle of the back |
umbar region | low back region of the spine composed of 5 vertebrae |
sacrum | five fused vertebrae that form the posterior of the pelvic girdle |