Chapter 6 - Bone tissue Flashcards Preview

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Flashcards in Chapter 6 - Bone tissue Deck (26)
1

What are the 6 main functions of bone?

support
protection
movement
mineral storage and release
blood cell production
fat storage

2

List the 7 parts of a long bone

diaphsyis
epiphyses
metaphysis
articular cartilage
periosteum
medullary cavity
endosteum

3

Diaphysis

bone shaft or body

4

epiophyses

the distal and proximal ends

5

metaphysis

- region where the diaphysis joins the epiphyses
- each metaphysis includes an:
epiphyseal (growth) plate or an epiphyseal line

6

articular cartilage

- thin layer of hyaline cartilage covering the epiphysis where the bone forms a joint
- reduces friction, improves fit and absorbs shock at freely movable joints

7

periosteum

a tough sheath of dense irregular connective tissue
- enables bone to grow in length
- protects the bone, nourishment, fracture repair, attachment pt
- attache to bone through perforating fibers
- rich in blood vessels and nerve fibers

8

medullary cavity

contains fatty yellow bone marrow in adults

9

endosteum

thin membrane that lines the medullary cavity

10

What are the 4 types of bone cell?

Osterogenic Cells
Osteoblasts
Osteocytes
Osteoclasts

11

Osterogenic Cells

(bone producing) - unspecialized stem cells derived from mesenchyme

12

Osteoblasts

(bone buds) - bone-building cells

13

Osteocytes

(bone cells), mature bone cells which maintain daily metabolism (exchange of nutrients and wastes)

14

Osteoclasts

( bone breakers) - break bone down (resorption) to allow for growth, maintenance, and repair of bone

15

What is the order in which the bone cells mature

Osterogenic Cells
Osteoblasts
Osteocytes
Osteoclasts

16

Which kind of bone has the following conditions
-Contains few spaces
- The strongest form of bone tissue.
- Found beneath the periosteum of all bones
- Function in protection and support

compact bone tissue

17

Volkmann’s Canals -

(Perforating)
horizontal channels for blood vessels, lymphatic vessels, and nerves

18

Haversian canals

(Central) canals
- vertical canals that connect with those of the medullary cavity

19

Lamellae

(Concentric)
rings of calcified extracellular matrix around the central canals

20

Lacunae

Little lakes
small spaces between the lamellae which contain osteocytes

21

Canaliculi

small channels (canals) with extracellular fluid radiate from the lacunae & allow osteocytes to share nutrition and remove waste

22

Gap junctions

allow cells to communicate

23

Components of compact bone tissue are arranged into repeating structural units called _________

osteons

24

How are osteons oriented

in the same direction of the lines of stress

25

What is the unique about spongy bone?

- does not contain osteons
- irregular pattern
- may be filled with red bone marrow
- lighter than compact bone

26

What are the two ways in which bone forms?

Intramembranous ossification
Endochondrial Ossification