Question

Breathing is a process that

1. provides O₂ to the body.
2. breaks down food to release energy.
3. helps the body to get rid of CO₂.
4. produces water in the cells.

Which of the following gives the correct combination of functions of breathing?

Options

• (i) and (ii)

• (ii) and (iii)

• (i) and (iii)

• (ii) and (iv)

Answer 1

(i) and (iii)

Explanation:

Breathing means taking in air rich in oxygen and giving out air rich in carbon dioxide with the help of respiratory organs. The taking in of oxygen-rich air into the body is called inhalation and giving out of carbon dioxide-rich air is known as exhalation.