Answer the following questions briefly.

1. The nutrients obtained from the food during digestion are supplied by the

circulatory system to the body. What does the circulatory system distribute to the

body as it works with the respiratory system?

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2. If solid and liquid wastes are removed from the body through defecation and

urination, what is released by the body as waste during respiration?

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3. What happens to the diaphragm when a person breathes in or inhales?

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4. Why is the human heart called a double pump?

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5. What will happen if oxygen is not transported by the blood to the different parts of

the body?

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6. Since the valves act as the doors of the heart, what might happen if these doors

do not close?

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7. When we breathe in, we inhale many gases present in the air, including oxygen.

What do you think happens to the gases that are not needed by the body?

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8. You always hear and see the statement, “Government Warning: Cigarette

smoking is dangerous to your health.” How does cigarette smoking increase the

risk of developing cardiovascular diseases?

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9. How does singing from the diaphragm, instead of the throat, help improve the

voice quality of a singer?

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10. An old woman joined a kilometer-dash sprint and felt very exhausted afterwards.

How did the old woman’s activity affect her heart rate?

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