ANATOMY

Detailed explanation-1: -The body needs oxygen for energy. It gets this oxygen from the air around you. When you breathe in through your nose or mouth, you pull air into your throat and down the windpipe.

Detailed explanation-2: -Respiratory System: Primary function is to obtain oxygen for use by body’s cells & eliminate carbon dioxide that cells produce. Includes respiratory airways leading into (& out of) lungs plus the lungs themselves.

Detailed explanation-3: -The bronchioles end in tiny air sacs called alveoli, where oxygen is transferred from the inhaled air to your blood. Alveoli look like clusters of small round fruits. After absorbing oxygen, the blood leaves your lungs and is carried to your heart.