Functions of the blood

Question 1

Four components of blood

Answer 1

Plasma, platelets, red blood cells, white blood cells

Question 2

Plasma

Answer 2

Blood minus the blood cells. A pale yellow liquid.

Question 3

What does it carry around the body?

Answer 3

1) Red and white blood cells (platelets)
2) Digested food products
3) Carbon dioxide
4) Urea
5) Hormones
6) Heat

Question 4

What are platelets

Answer 4

Small fragments that help blood clot

Question 5

How do platelets work?

Answer 5

1) When a blood cell is damaged, platelets clump together in this area
2) This is know as a blood clot
3) Blood clots stop you losing too much blood and prevent microorganisms from entering the wound
4) In a clot, the platelets are held together by a protein called fibrin

Question 6

Red blood cells carry oxygen

Answer 6

1) They are small and have a biconcave shape, giving them a large surface area for absorbing and releasing oxygen
2) They contain haemoglobin which contains a lot of iron
3) They don’t have a nucleus-this frees space for haemoglobin to carry oxygen