Front

What gas leaves our body when we exhale?

Back

Carbon dioxide.

Front

What muscle helps us breathe by contracting and relaxing?

Back

Diaphragm.

Front

What are the tiny sacs in the lungs where gas exchange occurs?

Back

Alveoli.

Front

Which two body systems work together to bring oxygen into the lungs?

Back

Muscular system and respiratory system.

Front

What is the name of the tube that carries air to the lungs?

Back

Trachea.

Front

What is the primary function of the respiratory system?

Back

To exchange gases (oxygen and carbon dioxide) between the body and the environment.

Front

What is the role of the diaphragm in breathing?

Back

It contracts to pull air into the lungs and relaxes to push air out.

Front

What is the process of taking in air called?

Back

Inhalation.

Front

What is the process of expelling air from the lungs called?

Back

Exhalation.

Front

What is the main organ of the respiratory system?

Back

Lungs.