MICROANATOMY

Detailed explanation-1: -When you inhale (breathe in), air enters your lungs, and oxygen from that air moves to your blood. At the same time, carbon dioxide, a waste gas, moves from your blood to the lungs and is exhaled (breathed out). This process, called gas exchange, is essential to life.

Detailed explanation-2: -When the diaphragm contracts, air is pulled into your airway through your nose or mouth. Air then travels down your airway, or trachea, dividing into your right or left lung via the bronchi. The bronchi then separate into small tubes called bronchioles.

Detailed explanation-3: -When you breathe in (inhale), air containing oxygen enters your windpipe, passes through the bronchi and eventually reaches the air sacs. These air sacs, called alveoli, are responsible for gas exchange. They look a bit like grapes at the end of the bronchial branches.