SKELETAL

Question 1

▪ Parts of the skeletal system

Answer 1

▪ Bones (skeleton)
▪ Joints
▪ Cartilages
▪ Ligament

Question 2

Two subdivisions of the skeleton

Answer 2

1. Axial skeleton
2. Appendicular skeleton

Question 3

Stores ______ and ___; as well as

Answer 3

minerals and fats;
Calcium and phosphorus;
Fat in the internal marrow cavity

Question 4

Blood cell formation

Answer 4

(hematopoiesis)

Question 5

adult skeleton has ___ bones

Answer 5

206

Question 6

sesamoid (patella) bones are ____ type of bones.

Answer 6

short bones

Question 7

Shaft
▪ Makes up most of bone’s length
▪ Composed of compact bone

Answer 7

▪ Diaphysis

Question 8

Outside covering of the diaphysis
▪ Fibrous connective tissue membrane

Answer 8

▪ Periosteum

Question 9

Ends of the bone
▪ Composed mostly of spongy bone enclosed by thin
layer of compact bone

Answer 9

Epiphysis

Question 10

Covers the external surface of the epiphyses;
Decreases friction at joint surfaces

Answer 10

▪ Articular cartilage

Question 11

Made of hyaline cartilage

Answer 11

Articular cartilage

Question 12

Marrow cavity, aka…?

Answer 12

medullary cavity

Question 13

Contains yellow marrow (mostly fat) in adults
▪ Contains red marrow for blood cell formation in
infants

Answer 13

medullary cavity

Question 14

▪ Cavity inside the shaft

Answer 14

medullary cavity

Question 15

In adults, red marrow is situated in cavities of _____ ____ and _______ of some long bones

Answer 15

spongy bone and epiphyses

Question 16

Osteocytes are situated within cavities known as
_______

Answer 16

lacunae

Question 17

Lacunae are arranged in concentric rings called ______

Answer 17

lamellae

Question 18

Lamellae are rings, around the central canal or
___________ _____

Answer 18

haversian canal

Question 19

Carries blood vessels and nerves

Answer 19

▪ Central (Haversian) canal

Question 20

▪ Form a transport system connecting all bone cells
to a nutrient supply

Answer 20

▪ Canaliculi

Question 21

__________ ____ deposited in the matrix make bone
hard

Answer 21

calcium deposits

Question 22

__________ _____ of the matrix make bone flexible

Answer 22

organic parts

Question 23

major phases of ossification in long bones

Answer 23

Osteoblasts;
Enclosed cartilage is digested away, opening up a medullary cavity

Question 24

PTH means? (p.46)

Answer 24

Parathyroid Hormone