PATHOLOGY

Detailed explanation-1: -The diaphragm is the main muscle for breathing. This dome-shaped wall of muscle does most of the breathing work by expanding and contracting the chest to draw air in and out of your lungs. When the diaphragm contracts, air is pulled into your airway through your nose or mouth.

Detailed explanation-2: -Breathing in They contract to pull your rib cage both upward and outward when you inhale. As your lungs expand, air is sucked in through your nose or mouth. The air travels down your trachea, or windpipe, and into your lungs. After passing through your bronchial tubes, the air travels to the alveoli, or air sacs.