Blood

Question 1

Which cells caryy oxygen around the body?

Answer 1

Red blood cells

Question 2

Describe the features of red blood cells

Answer 2

1. carry oxgen around the body
2. have a large surface area
3. no nucleus

Question 3

What is the function of white blood cells?

Answer 3

Fight infection

Question 4

What do white blood cells do to fight infection?

Answer 4

1. engulf (phagocytosis)

2. Produce antibodies

Question 5

What do platelets do?

Answer 5

help blood to clot

Question 6

What is the liquid called that carries everything?

Answer 6

Plasma

Question 7

Which blood cells fight infection?

Answer 7

White blood cells

Question 8

Which cells carry oxygen

Answer 8

red blood cells

Question 9

Which cells help the blood to clot?

Answer 9

Platelets

Question 10

What are the smallest blood vessels called?

Answer 10

Capillaries

Question 11

Describe a capillary

Answer 11

1. one cell thick
2. small lumen (hole)
3. allow diffusion
4. squeeze into gaps

Question 12

Which vessel takes blood to the heart?

Answer 12

Veins

Question 13

Describe the features of veins

Answer 13

1. can change shape (elastic fibres)
2. bigger lumen (hole in middle)
3. has valves
4. takes blood to the heart

Question 14

Which vessel carries blood away from the heart?

Answer 14

Artery

Question 15

Describe an artery

Answer 15

1. high pressure
2. more elastic and stronger
3. smaller lumen
4. carry blood away from the heart

Question 16

Why is the blood at a higher presssure in the artery

Answer 16

Because it is carrying blood away form the heart

Question 17

Why are arteries stronger than veins

Answer 17

Because the blood is at a higher pressure

Question 18

What type of circulatory sytem do mammals have?

Answer 18

Double

Question 19

What is the formula for cardiac output?

Answer 19

stroke volume x heart rate