What is the voice box also known as?

What muscle contracts to make room for air in your lungs?

What is the respiratory system?

What is the main organ in the respiratory system?

The respiratory system is made up of the trachea, the lungs, and the:

When you breathe in air, you bring oxygen into your lungs and blow out:

What is the name of the tiny air sacs in your lungs?

The tiny hairs that keep mucus and dirt out of your lungs are called:

What do you call the exchange of oxygen and carbon dioxide in the body?

What brings oxygen into our body?

What is the air that we breathe in into our lungs?

Which part of the body is not used for the respiratory system to work?

Which system helps you to breathe?

How many lungs does a person have?

What are the main passageways (tubes) into the lungs?