The Skeletal System

Question 1

Bones are made up of:

Answer 1

Bone cells, fat cells, and blood vessels

Question 2

Composition of Bone

Answer 2

70% cellular components
Inorganic salts (eg. Ca, P)
Organic material (eg. collagen fibre)
30% water

Question 3

Functions

Answer 3

Support - framework of body
Movement - muscles contract, bones move (lever for muscles)
Protection - eg. skull, ribs
Storage - eg. marrow
Growth - RBC's, platelets made in bones

Question 4

Long Bone

Answer 4

Arms and legs. Bone has cartilage on either end (eg. femur, radius, ulna) (movement)

Question 5

Short Bone

Answer 5

Wrists and ankles, touches other bones (eg. carpals and tarsals) (movement)

Question 6

Flat Bone

Answer 6

Flat and thin (eg. ribs, scapula, clavicle) (protection)

Question 7

Irregular Bone

Answer 7

Odd-looking bones (eg. pelvis) (ALL)

Question 8

Sesamoid Bone

Answer 8

Small, flat bones wrapped with tendons that move over bony surfaces (eg. patella) (ALL)