1. iGCSE revision powerpoint 3 There are 100 questions!

2. Nutrition • What type of food are these? • What are they used for in the body?

3. Nutrition 2 • What is protein needed for? • What is another word for “fats and oils”? • Which food is a source of Vitamin A? • What is Vitamin C needed for? • What is Calcium needed for? • And Iron? • Why is fibre needed?

4. The alimentary canal 10 – 18 top to bottom, left first then right. 19 - 20 give two reasons why the stomach contains HCl 21 – what is the job of the pancreas in the digestive system?

5. Digestion words • Which word describes taking food into the mouth? • Give a definition of “digestion”. • What is assimilation? • Which word describes getting rid of undigested food? (clue: it is NOT pooing) • Which word describes the muscular contractions which move food through the system?

6. Digestive enzymes – fill in the table

7. More digestion • Where is bile produced? • Where is it stored? 36 – 37 What two jobs does it do? 38. What is this? 39. Where would you find it? 40-41 give two ways in which it is adapted for efficient absorption

8. Biological molecules 42 – 43 How would you test for starch? 44 – 46 How would you test for glucose? • What is going on here? • What would happen to the thing labelled B if it got too hot?

9. Respiration • Where in the body does this happen? • Write the word equation. • (H) Write the symbol equation. 52 – 53 Give two differences between aerobic and anaerobic respiration. 54 – what is produced in anaerobic respiration in plants? 55 – what is produced in anaerobic respiration in animals?

10. Lungs • Part labelled A and B. • What does this have to strengthen it? • Part C • What is between these? • Part G • Part E

11. More lungs 62. What is the name for the upper part of the body where the lungs are found? • What is the name of the membrane surrounding the lungs? • What is the name of the air sacs? 65. What happens in the air sacs? 66 – 68 give three ways in which no. 64 are adapted for no. 65

12. Smoking • What, exactly, has made these lungs go black? • What is the problem with carbon monoxide from cigarettes? 71. What is the stuff which is addictive? 72. Why do smokers cough?

13. Heart 73 – 84 Top to bottom, left side first.

14. Blood 85-87 top to bottom 88 – what is the liquid called? 89-92 name four things transported In this liquid 93-94 describe two ways in which white blood cells protect against disease.

15. Circulation 95-97 Left to right 98 – the blood vessels to and from the lungs are? 99 – the blood vessels to and from the kidneys are? 100 – the blood vessels to and from the liver are?