osteology 2
Terms
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- Composition of Osseous Tissue?
- Blood, Cartilage, Adapose, Nervous
- 2 primary tissues of osseous tissue
- CT and nervous
- organic components of bone tissue
- cells and colagen
- inorganic components of bone tissue
- hydroxyapatites
- hydroxyapatites =
- mineral salt, primarily calcium phosphate
- 99% of Ca is in the form of?
- hydroxyapatites
- functions of bone tissue
- support, protection, movement, mineral storage and hemopoiesis
- hemopoiesis?
- blood cell formation
- classification of bones by shape
- long bones, short bones, flat bones, irregular bones
- Sesamold bone?
- bone that forms w/in a tendon (ex. patella)
- osteon?
- compact bone, functional unit, each osteon is a tiny weight bearing pillar, parallel to each other
- spongy bone
- found in epiphysis, absorbs stress
- flat bones have?
-
a diploe structure (sandwich) - compact bone
spongy bone
compact bone - red marrow found in?
- epiphysis and medullary cavity
- most amt of red marrow producded in?
- hips and humerus epiphysis
- Where is yellow marrow found?
- Medullary cavity
- Osteogenic cells
- "stem cells", make osteoblast and osteoclast, hold all the genitic info to make all cells in the body
- Osteoblasts
- build matrix, increases matrix formation during exercise or other physical stress, amitotic
- osteoclasts
- breakdown matrix to release Ca and remodel matrix under stress conditions, secrete an acid, amitotic
- osteocytes
- walled in osteoblasts that become embedded in lacunae, senses cracks/pressure stress points for repair, amitotic
- ossification
- formation of bone from cartilage/membrane
- 2 tyes of ossification
-
intramembraneous - replaces fibrous membrane in flat bones of skull/ribs
endochondral- hyaline cartilage becomes a model for rest of skeleton - 2 trypes of bone growth
-
interstitial growth - longitudinal growth
appositional growth- width - interstitial growth
- hormonally controlled, epiphyseal plate seals