Respiratory System

When you inhale do your lungs inflate or deflate?

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

_________ is not good for your lungs.

Your body can't breathe without this system. What system is it?

When you breathe in air, you bring oxygen into your lungs and blow out what gas?

What are the 3 main parts of the respiratory system?

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

As you breathe, this contracts and flattens to give your lungs room to fill up with air:

The trachea is also called the:

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