Anatomy 1.02-1.03
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1
the basic microscopic unit of bone, concentric layers of bone around a haversian canal (blood supply) creating a cylindrical structure
Haversian system/osteon
2
compact mature bone
Lamellar bone
3
what are the three types of bone cells
osteoclasts
osteoblasts
osteocytes
osteoblasts
osteocytes
4
what is the function of osteoclasts
resorbs bone
5
what is the function of osteoblasts
build bone
6
what is the function of osteocytes
bone maintenance
7
osteoblasts that get trapped in lacunae become ____________________
osteocytes
8
the molecular structure of bone has a 2 phase composite what are the 2 phases
35% organic and 65% inorganic
9
what is the organic matrix made of
Type I collagen
10
protein that occurs in long flexible fibers
Type 1 collagen
11
what is the function of Type I collagen
elasticity, flexibility, strength in tension
12
what is the inorganic matrix made of
hydroxyapatite
13
what is the function of hydroxyapatite
rigidity, hardness, and strength in compression
14
what happens when bone is burned
- collagen is removed
- left with inorganic calcium/hydroxyapatie
- bone becomes brittle
- left with inorganic calcium/hydroxyapatie
- bone becomes brittle
15
what happens when bone is placed in acid
- minerals are removed
- left with organic proteins/collagen
- bone becomes elastic
- left with organic proteins/collagen
- bone becomes elastic
16
mature bone cell that maintains the bone matrix
osteocytes
17
stem cells whose divisions produce osteoblasts
osteogenic cells
18
multinucleate cell that secretes acids and enzymes to dissolve bone matrix
osteoclasts
19
immature bone cell that secretes osteoid, the organic compenent of bone matrix
osteoblasts
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