Lab Oral #3 Flashcards Preview

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Flashcards in Lab Oral #3 Deck (48):
1

Bone is a type of

Connective tissue

2

Bone is arranged at the microscopic level into systems called

Osteons

3

Osteon is

Basic functional & structural unit of mature compact bone

4

Osteons run parallel to

The diaphysis of the long bone

5

Each osteon has a central (or haversion) canal which

Supplies the blood vessels & nerves to the living cell of bone

6

The cells of bone that are living are called?

Osteocytes

7

Osteocytes are housed

In lacunae & are found between adajacent concentric lamellae

8

Matrix of bone is

Rigid & is laid down by osteocytes; so the living cells lay down a non-living matrix level/layer which is hard material

9

If osteocytes were removed, such as when the bone dies, what would happen?

There would be a space or a gap that would remain. This space is called the lacunae.

10

Bone is laid down in concentric

Rings

11

Each ring of bone is called?

A lamellae

12

Lamellae are

Rings of bone connective tissue that surround the central canal & form the bulk of the osteon

13

Communication from one lamellae (ring) to the next is through what?

Very small canals called canaliculi

14

Canaliculi are

Tiny, interconnecting channels within the bone connective tissue that extend from each lacuna, travel through the lamellae, & connect to other lacunae & the central canal

15

The periosteum

A fibrous sheath that surrounds the whole bone & many osteons.

16

The skeleton is arranged into two subdivisions

The axial skeleton & the appendicular skeleton

17

The axial skeleton is made up of

The skull, vertebral column, ribs, & sternum

18

The ribs & sternum together are known as

The thoraces

19

The thoraces, skull, & vertebral column make up

The axial skeleton

20

The ends of long bones are called?

Epiphyses

21

The shaft of a long bone is called?

Diaphysis

22

A proximal epiphysis is?

The end of a long bone closest to the body trunk

23

A distal epiphysis is?

The end of a long bone farthest from the trunk of the body

24

Between the diaphysis and each epiphysis is a thin layer of cartilage called

The epiphyseal line

25

Bone is lengthened at

The epiphyseal line which means new bone is laid down at this juncture

26

Once a person is mature the epiphyseal line will

Ossify, meaning become non cartilaginous & become bony. At this point there is no more growth

27

The space in the middle of bone is?

The medullary cavity, which is in the shaft of the bone

28

The dense bone around the medullary cavity is?

Compact bone

29

The airy bone, like sponge, at each end and along the narrow cavity is?

Spongy bone

30

Compact bone is

Very rigid & not many airy spots

31

Spongy bone is

Airy, looks like a sponge

32

Spongy bone does not contain what?

Any osteons, instead it contains trabeculae which is composed of parallel lamellae

33

A hole in a bone

Foramen

34

Shallow depression or dent

Fossa

35

Any projection or bump

Process

36

Expanded end of a bone

Head

37

A ridge

Crest

38

A thin process

Spine

39

A long, narrow cleft

Fissure

40

Low ridge

Line

41

Smooth, rounded process

Condyle

42

An angled projection of a bone

Ramus

43

Smooth, grooved structure

Trochlea

44

Large, rough spot

Trochanter

45

Smaller, rough spot

Tuberosity

46

Small, rough process

Tubercle

47

Small, flat articular surface

Facet

48

Canal with one entrance

Meatus