Biology series-4: heart, lungs and diaphragm movement

How your heart and lungs move when you breathe:

The diaphragm is a curved, thin muscle sheet under the lungs. It contracts and flattens when you inhale. This creates a vacuum effect that pulls air into the lungs.

When you exhale, the diaphragm relaxes and the air is pushed out of the lungs.

Important to get diaphragm move inside the body to get lower lungs activated to get more oxygen if not only mostly upper lungs work. 

Source: youtubecom/watch?v=t6AYJSbq6yk