CHARACTERISTICS AND PROPERTIES OF BONE

Question 1

What are the five functional roles of the skeletal system?

Answer 1

1. Support of body
2. Protection of internal organs
3. Levers for skeletal muscles to act
4. Production of blood cells through bone marrow
5. Storage of minerals

Question 2

What kind of material is bone?

Answer 2

Composite material

Question 3

What is composite material?

Answer 3

Two or more materials come together to form something

Question 4

What two materials is bone made up of?

Answer 4

70% calcium phosphate crystals (inorganic) and 30% collage fibers (organic)

Question 5

What are the two characteristics of calcium phosphate crystals (inorganic)?

Answer 5

1. Very strong but inflexible
2. Ability to resist compressive stress

Question 6

What are the two characteristics of collagen fibers (organic)?

Answer 6

1. Tough and flexible
2. Ability to resist stretching, bending and twisting stresses

Question 7

What can bone do under the influence of external forces?

Answer 7

Since bone is responsive material, bone remodels (changes shape overtime)

Question 8

What does it mean when bone is anisotropic?

Answer 8

Properties will vary depending on orientation of material; different strength and hardness properties depending on its orientation