Question

Which of the following is the first step in respiration?

Question options:

Carbon dioxide passes into capillaries to the blood.

Oxygen is taken into the lungs.

Carbon dioxide passes from the blood to the lungs.

Oxygen passes into capillaries to the blood.

Answer 1

The main function of the respiratory system is breathing, a process that is also referred to as respiration. This

process allows the body to bring in oxygen and expel (get rid of) carbon dioxide. During respiration, oxygen travels

through the bloodstream and carbon dioxide is carried away.

Answer 2

Oxygen is taken into the lungs.