Question

We all know about diaphragm but do we know what happens when we breathe in?

• A. The diaphragm pushes down
• B. The diaphragm pushes up
• C. The diaphragm has no role in breathing
• D. The diaphragm differs from person to person

Answer 1

The correct option is A

The diaphragm pushes down

When the diaphragm contracts and moves lower, the chest cavity enlarges, reducing the pressure inside the lungs. When air enter lungs the diaphragm moves back up, the elasticity of the lungs and chest wall pushes air out of the lungs.