Chapter 6- Skeletal System

Question 1

Bone is… (4 things)

Answer 1

1-composite-inorganic (65%) or organic (35%, cells, blood, nerves, collagen)

2- dynamic (always changing)

3-living

4- tissue- that changes as a result of the forces acting on it

Question 2

Hydroxyapatite equation (memorize) is?

Answer 2

(Ca10) (Po4)6 (OH)2

Question 3

EPIPHYSIS…

Answer 3

-end of bone
-RED bone marrow found here

Question 4

Diaphysis

Answer 4

-shaft of bone
- YELLOW bone marrow (adipose) found here.

Question 5

PERIOSTEUM
-outer layer
-inner layer

Answer 5

-outer layer- fibrous layer made of dense irregular connective tissue. ( has blood vessels and nerves)

-INNER CELLULAR LAYER- just cells
-osteoblast(active builder)
-osteocytes (maintains)
-osteoclasts (destroys bones)

Question 6

ENDOSTEUM

Answer 6

Cell layer only, covers spongy bones

Question 7

Functions of skeletal system

Answer 7

1-protection
2-support
3-movement
4-mineral storage
5-lipid storage
6- blood cell production

Question 8

What is an Osteocyte?

Answer 8

An osteoblast after it’s been walled in

-maintains

Question 9

Bony matrix (ECM) -what is it?

Answer 9

65% inorganic (no carbon)

- 2/3 of bone is hydroxyapatite Ca10 (Po4)6 (OH)2

35% organic (have carbon)
-bone cells, collagen fibers, blood, nerves, proteoglycans