Answers to The Human Body

1. The Iris

2. The middle ear

3. Arteries

4. Nerve cells

5. Meninges

6. Corpus callosum

7. The biceps

8. It prevents bones from rubbing and pressing against each other and thus wearing away.

9. Plasma

10. The higher one is the systolic pressure (the peak contraction of the heart), the second for the diastolic pressure (the heart during relaxations).

11. Tendons

12. Capillaries

13. To fight infection

14. The two pumps of the heart

15. Insulin

16. About 5 litres (10 Pints)

17. At the base of the brain

18. In the toes

19. Bone marrow

20. The femur, situated in the thigh

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