Chapter 3 Skeletal Sysytem

Question 1

What are the five functions of the skeletal system?

Answer 1

1. Support
2. Protection
3. Movement
4. Storage
5. Hematopoesis

Question 2

Bones that are longer than they are wide?

Answer 2

Long Bones

Question 3

Bones that are generally cube shaped and contain mostly spongy bone?

Answer 3

Short Bones

Question 4

Bones that are thin, flattened and usually curved?

Answer 4

Flat Bones

Question 5

Bones that do not fit into the above classifications

such as the spinal column and hip bones?

Answer 5

Irregular Bones

Question 6

Bones are?

Answer 6

Organs

Question 7

2 major types of connective tissue in the skeletal system?

Answer 7

1. Bone

2. Cartilage

Question 8

The outer layer of bone is called?

Answer 8

Compact or Dense

Question 9

The matrix, of compact bone is organized into

structural units called?

Answer 9

Osteons

Question 10

Each osteon is composed of
calcified matrix arranged in multiple layers or rings. Each layer is
called a?

Answer 10

Concentric lamella

Question 11

Osteocytes lie between the lamella in little spaces called?

Answer 11

lacunae

Question 12

Porous bone at the end of long a bone is called?

Answer 12

Spongy bone

Question 13

Spongy bone contains many spaces which are

filled with?

Answer 13

Marrow

Question 14

The needle-like threads of spongy bone that

surround these spaces is called?

Answer 14

Trabeculae

Question 15

Cartilage cells are called?

Answer 15

Chondrocytes

Question 16

Chondrocytes are lacated in the?

Answer 16

Lacunae

Question 17

There are no blood vessels in?

Answer 17

Cartilage

Question 18

Cartilage receives its nutrients by?

Answer 18

Diffusion

Question 19

There are ____ main parts of a long bone?

Answer 19

6

Question 20

Hollow tube made of hard compact bone?

Answer 20

Diaphysis (shaft)

Question 21

This is the hollow area inside the diaphysis?

Answer 21

Medullary cavity

Question 22

This is the end of the bone; red bone marrow fills the small spaces in the spongy bone that compose the?

Answer 22

Epiphyses

Question 23

A thin layer of cartilage which covers the epiphyses like a rubber cushion?

Answer 23

Articular cartilage

Question 24

This is a strong fibrous membrane covering long bones except at joint surfaces where it is covered by articular cartilage?

Answer 24

Periosteum

Question 25

This is a fibrous membrane that lines the medullary cavity?

Answer 25

Endosteum

Question 26

At approximately _____ weeks after conception, the skeleton begins to form in the baby?

Answer 26

Six

Question 27

Most bone formation occurs by replacing hyaline cartilage structures; this is known as?

Answer 27

Endochondral ossification

Question 28

A few flat bones (skull bones) develop from a fibrous membrane; this is known as?

Answer 28

Intramembranous ossification

Question 29

Bone forming cells are called?

Answer 29

Osteoblasts

Question 30

Bone-reabsorbing cells are

called ?

Answer 30

Osteoclasts

Question 31

The human skeleton has ____ divisions?

Answer 31

2

Question 32

The two divisions are?

Answer 32

Axial and appendicular