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Science Exercise 3

Key stage 3 Science Exercise

1. The ribcage protects the __________ .

2. The diaphragm is a dome shaped ________ .

3. The air that you breathe in passes through the ________.

4. Inhaled air enters into the ______ .

5. A waste product of respiration is _______ .

6. The gases move in to or out of the bloodstream during __________ .

7. The lungs are very well adapted for exchange of ________ .

8. Breathing is the process of getting air into and out of your ________.

9. Each person has ________ lung volume.

10. Lung volume can be measured using a machine called a ________ .

11. Your muscles need more __________ and glucose during exercise.

12. A healthy body is one that's every thing working properly with no ________.

13. Solvents can cause damage to the ______, the brain, liver and kidney.

14. Alcohol affects the ________ and brain.

15. The human skeletal system has __________ bones.

16. The muscular system has approximately ________ muscles.

17. Bones are formed from different types of ________.

18. The ______ layer of bones have very strong tissue.

19. The inner layer is made from ________ tissue.

20. The skeletal system performs _______ key functions.

Answers:1. lungs 2. muscle 3. trachea 4. lungs 5. Carbon dioxide 6. diffusion 7. gases 8. lungs 9. different 10. spirometer 11. oxygen 12. diseases 13. lungs 14. liver 15. 206 16. 640 17. tissue 18. outer 19. spongy 20. four

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