Which system helps you to breathe?

How many lungs does a person have?

Which one of these is good for your lungs?

Breathing in and breathing out are also called:

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 trachea is also called the:

Which of these is part of the respiratory system

What is the respiratory system?

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