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Flashcards in Skeletal System Deck (191)
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1

Is the functional unit of skeletal system

Osteon/ Haversian system

2

How many bones present in infant?
in adult?

Infant- 305
Adult - 206

3

Amount of calcium found in bones

90-99%

4

Calcium is mainly absorbed in what organ?

Intestines

5

Reason why there is reduced amount of bones in adult compared to children.

Ossification of hyaline cartilages in between bone resulting to fusion of some bones

6

The mature cells that produces the BONE

Osteocyte

7

The immature cells that produces the BONE MATRIX

Osteoblast

8

The only multi-nucleated giant cell that destroys the bone

Osteoclast

9

What components are present in BONE MATRIX?

COLLAGEN TYPE 1
HYDROXYAPATITE

10

Hydroxyapatite crystals is the result of what minerals?

Calcium + Phosphate

11

Houses osteocyte and osteoblast except osteoclast.

Lacuna/Lacunae

12

Houses the osteoCLAST

Howship's lacunae

13

Howship's may refer to?

Multinucleated giant cell

14

It is the lifelong process where mature bone tissue is removed and replaced by new bone

Bone Remodelling

15

It is the process of REMOVING bone need to be remodeled.

Resorption

16

It is the process of producing NEW BONE MATRIX

Ossification

17

Bone remodeling involves what cells?

OsteoBLAST and OsteoCLAST

18

Type of bone that mainly contributes in GROWTH

Long bones

19

Examples of bone that belongs to LONG BONE

Humerus
Ulna
Radius
Femur
Tibia
Fibula
Metacarpals
Metatarsals and
Phalanges

20

Shaft of Long bones is called?

Diaphysis

21

Found between Diaphysis and Epiphysis

Metaphysis

22

Proximal and distal that marks the growth of the long bone

Epiphysis

23

What serves as the main site in growth?

Epiphysis

24

Hormone involve in growth

Somatotropin/GH

25

What process marks the end of growth?

Closure of EPIPHYSEAL PLATE

26

Examples of SHORT BONES

carpals and tarsals

27

Examples of FLAT BONE

ilium, scapula sternum and ribs

28

Examples of IRREGULAR BONE

Vertebrae, Facial bones, sphenoid, temporal and ethmoid

29

Type of bone that is incorporated to a tendon of a muscle.

Sesamoid

30

Example of sesamoid bone

Patella