Chapter 17: Movement in humans

Question 1

Bones

Answer 1

• Tissue formed by living cells
• Consists of minerals (e.g. CaSO4, make the bone rigid), proteins (e.g. collagen) and water

Compact bone
- Outer shell of all bones, shafts of limb bones
- Dense and rigid -> providdes great strength for supporting the weight of the body
- Yellow bone marrow fills the shafts of limb bones

Spongy bone
- Head of limb bones
- Porous -> absorb shock and resist stress
- Red bone marrow fills the cavities of spongy bones

Question 2

Bone marrow

Answer 2

Yellow bone marrow:
- fills shafts of limb bones
- fatty tissue, stores fat

Red bone marrow:
- fills cavities of spongy bones
- produces blood cells

Question 3

Cartilage

Answer 3

• tissue formed by living cells
• contains fewer minerals → softer and more elastic