BloodHow

1. How many types of blood cells are there in our body?What are they?
2. 3 types. They are red blood cells. white blood cells and platelets.
3. How are the red blood cells?
4. They are small,thin and disc shaped.
5. What are they composed of?
6. iron containing component.
7. What is it called? haemoglobin.
8. What is the function of the haemoglobin?
9. When blood passes through the lungs  each haemoglobin molecule picks up four oxygen molecules and supplies them to the body tissues.
10. What else do the red blood cells do/
11.  They transport the carbon dioxide  from the tissues to the lungs.
12. What do the lungs do?Lungs throw out carbon dioxide when we exhale.
13. Describe White blood cells.
14. They are bigger than the red blood cells.
15. They are few in numbers.
16. Only one for every 700 red cells.
17. They are body defenders.
18. They act as soldiers to fight bacteria. and other enemies.
19. They destroy the dead cells.
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