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Flashcards in Bones Deck (25):
1

Epiphysis

Ends of bone

2

Articulate cartilage

Layer of hyaline cartilage cover epiphysis. Reduces friction and absorbs shock

3

Periosteum

Tough connective tissue sheath that provides blood supply. Protects, repairs, nourish and attach ligaments and tendons

4

Medullary cavity

In diaphysis. Contains yellow narrow

5

Endosteum

Thin layer that's lines medullary cavity

6

Osteoprogenitor crll

Unspecified cells that can divide

7

Osteoblasts

Forms bone. Secretes collagen fibers for strength

8

Osteoclasts

Bone cell. Maintains cell activity

9

Osteoclasts

Bone breakers

10

Resorption

Breakdown of bone to repair bone

11

Epiphyseal line

Remnant of epiphyseal plate

12

Epiphyseal plate

Growth plate. Hyaline cartilage. In metaphysis

13

Compact bone

Protects, supports and resists stress by weight and movement

14

Spongy bone

Contains trabeculae. Filled with red bone marrow and produces blood cells

15

Canaliculi

Small canals in bone that connect lacunae

16

Diarthroses

Freely moveable joints

17

Amphiarthroses

Slightly moveable joints

18

Synarthroses

Immovable joints

19

PTH

Parathyroid gland. Stimulates osteoclasts to break bone and increase blood calcium level.

Low blood calcium level - PTH released Osteoclasts to break bone - calcium goes in blood stream

20

Calcitonin

Thyroid gland. High calcium levels stimulates osteoblasts for bone deposition.

High blood calcium levels - calcitonin release osteoblasts to form bone - calcium goes in bone and out of blood

21

Structural classification of joints

Fibrous, cartilaginous, synovial

22

Functional classification of joints

(Joint movement)
Synarthroses, amphiarthroses, diarthroses

23

Diaphysis

Bone shaft

24

Intramembranous ossification

Osteoblasts secret matrix - calcium/salts absorbed and matrixs hardens (calcifies) - trabeculea develops and forms spongy bone - development of periosteum

25

Endochondral ossification

Development of cartilage by chondroblasts - cartilage grows from cell division of chondrocytes - (primary) bone (diaphysis) replaces most cartilage - bone breakdown forms medullary cavity - (secondary) occurs in epiphysis - articular cartilage and epiphyseal plate form