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