The diaphragm is a dome shaped muscle under the lungs that helps with breathing. It pushes on the lungs to build pressure when breathing out so air can exit the body, and releases pressure when breathing in so air can enter the lungs.

1. The Diaphragm

2. What is it?
The Diaphragm is a dome shaped muscle under
the lungs.

3. What does it do?
It helps you breathe. When you breathe out it
pushes on the lungs to build pressure so the air
can exit, and when you breathe in it releases the
pressure.

4. It works like this....