Blood/heart

Question 1

What are red blood cells?

Answer 1

Contains haemogoblins
Binds to oxygen to transport
No nucleus and small

Question 2

What are white blood cells?

Answer 2

Protect body against infection
can change shapes

Question 3

What are platelets?

Answer 3

Dead cells to trigger blood clotting

Question 4

Describe the arteries

Answer 4

Thick wall made from muscle
Transports blood from heart to organs

Question 5

Describe the veins

Answer 5

Thin walls with valves to prevent back-flow
Transports blood from organs to heart

Question 6

Describe the capillaries

Answer 6

Narrow and thin-walled
Allow substances needed by cells out
Allow substances produced by cells in

Question 7

Describe the 4 chambers of the heart

Answer 7

Vena Cava- carries blood from body to heart

Aorta- carries blood from heart to body

Pulmonary artery- carries deoxygenated blood from heart to lungs

Pulmonary vein- carries oxygenated blood from lungs to hearts

Question 8

What is coronary heart disease?

Answer 8

Layers of fatty material build up inside the coronary arteries and narrow them

Question 9

How to treat coronary heart disease

Answer 9

Stents: keep the coronary arteries open

Statins: reduce blood cholesterol levels and slows down rate of build up of fatty acids

Question 10

Describe Plant features (epidermis, palisade mespohyll, spongy mesophyll)

Answer 10

Epidermis- cover outer surface for protection
Palisade mesophyll- site of photosynthesis
Spongy mesophyll- air spaces allow gas to diffuse
Xylem vessels- transport water and minerals from root to leaves
Phloem vessels- transports food materials