Breathing

Question 1

How do you breathe?

Answer 1

When you breathe, muscles in your chest tighten or contract

Question 2

How can we measure lung volume?

Answer 2

You can measure lung volume using a plastic bottle. As you breathe out into the plastic tube, air from your lungs takes the water in the bottle. If you breathe out fully, the volume of water pushed out of the bottle is equal to how much air your lungs can hold.