How it Affects Your Lungs
You have 2 lungs. Each lung has separate sections called lobes.
Normally as you breath, air moves freely through your trachea (wind pipe), then through large tubes called bronchi and small tubes called bronchiole. Finally the air moves into tiny sacs called alveoli. When you breathe in, each air sac inflates like a small balloon and when you breathe out it deflates. These air sacs are surrounded by capillaries through which blood flows. The oxygen in your air sacs is exchanged with carbon dioxide in the blood via diffusion. The carbon dioxide released to the air sacs will be then exhaled out.
When you have pneumonia- the alveoli( air sacs) become inflamed and fill up with fluid.