Skeletal System

Question 1

Why is the bone strong and yet light?

Answer 1

Strong because of compact bone (support) while light because of spongy bone

Question 2

Skeletal System is composed of?

Answer 2

bones, joints, cartilages, ligaments

Question 3

What is the internal framework of the body?

Answer 3

bone

Question 4

How many bones we have in the body?

Answer 4

206

Question 5

How many bones we have in axial subdivision of skeleton?

Answer 5

80

Question 6

How many bones we have in appendicular subdivision of skeleton?

Answer 6

126

Question 7

Serious birth defect in which a baby is born without parts of brain and skull

Answer 7

ancencephaly

Question 8

What are the functions of bones?

Answer 8

support, attachment, storage, hematopoeisis

Question 9

What is cancellous bone?

Answer 9

synonym to spongy bones

Question 10

This contains the osteocytes.

Answer 10

trabeculae

Question 11

Contain mostly of compact bone; spongy bones at ends

Answer 11

long bone

Question 12

Examples of long bone

Answer 12

femur (lower thigh), humerus (upper arm), radius and ulna (forearm), fibula and tibia (lower leg)

Question 13

Contain mostly spongy bone with an outer layer of compact bone

Answer 13

short bone

Question 14

Type of short bone that form within tendons

Answer 14

sesamoid bones

Question 15

Examples of short bones

Answer 15

carpals (wrist), tarsals (ankle)

Question 16

Sandwich; two thin layers of compact bone (top and bottom) and a layer of spongy bone (in between)

Answer 16

flat bone

Question 17

Do not fit into other bone classification

Answer 17

irregular bone

Question 18

Diaphysis is composed of?

Answer 18

compact bone

Question 19

Epiphysis is composed of?

Answer 19

mostly spongy bone enclosed by thin layer of compact bone

Question 20

Importance of spongy bone in epiphysis?

Answer 20

the spaces between trabeculae contains red marrow

Question 21

Covers the entire outer surface except where epiphysis meet the other bones to form the joints

Answer 21

periosteum

Question 22

Periosteum is composed of 2 layers:

Answer 22

fibrous connective tissue membrane, cellular layer

Question 23

Ensure periosteum will remain intact

Answer 23

Sharpey’s fibers

Question 24

Covers the external surface of epiphyses

Answer 24

articular cartilage

Question 25

Articular cartilage is made of?

Answer 25

hyaline cartilage

Question 26

Decreases friction at joint surfaces where 2 bones meet; prevents damage whenever we generate movement)

Answer 26

articular cartilage

Question 27

Cause lengthwise growth of a long bone

Answer 27

epiphyseal plate

Question 28

Lines the inner surface of diaphysis

Answer 28

endosteum

Question 29

Contains yellow marrow in adults; contains red marrow only in infants

Answer 29

medullary cavity

Question 30

To what age is the red marrow in the medullary cavity?

Answer 30

Age 6 or 7

Question 31

Site of attachments for muscles, tendons, and ligaments

Answer 31

bone markings

Question 32

Passages for nerves and blood vessels

Answer 32

bone markings

Question 33

Grow out from the bone surface

Answer 33

projections or processes

Question 34

Indentations

Answer 34

depressions or cavities

Question 35

Terms often begin with “T”

Answer 35

projections or processes

Question 36

Terms often begin with “F”

Answer 36

depressions or cavities