Exercise 6: The Skeletal System

Question 1

The cross section of a human bone shows the following structures:

Answer 1

Haversian system or osteon,
endosteum,
periosteum,
bone matrix or lamella

Question 2

The four types of lamellae classified according to location are:

Answer 2

endosteal lamella,
Haversian lamella,
interstitial lamella,
periosteal lamella

Question 3

The endosteal lamella is also known as:

Answer 3

inner circumferential lamella

Question 4

The Haversian lamella is also known as:

Answer 4

concentric lamella

Question 5

The periosteal lamella is also known as:

Answer 5

outer circumferential lamella

Question 6

It is the bone matrix associated with the endosteum.

Answer 6

endosteal lamella

Question 7

It is the bone matrix associated with the Haversian systems.

Answer 7

Haversian lamella

Question 8

It is the bone matrix in between Haversian systems.

Answer 8

interstitial lamella

Question 9

It is the bone matrix associated with the periosteum.

Answer 9

periosteal lamella

Question 10

It functions as the framework of the body.

Answer 10

skeleton

Question 11

The adult human skeleton is composed of ___ bones.

Answer 11

206

Question 12

___ bones constitute the axial division.

Answer 12

80

Question 13

___ bones constitute the appendicular division.

Answer 13

126

Question 14

It forms the longitudinal axis of the body.

Answer 14

axial skeleton

Question 15

The axial skeleton is made up of:

Answer 15

skull,
vertebral column,
ribs,
sternum

Question 16

The appendicular skeleton is made up of:

Answer 16

girdles (pectoral and pelvic),

appendages (upper and lower extremities)

Question 17

Five principal types of bones:

Answer 17

long bones,
short bones,
flat bones,
irregular bones,
sesamoid bones