PATHOLOGY

Detailed explanation-1: -Lungs contain specialised structures called alveoli which are the site of exchange of oxygen and carbon dioxide between the blood and air. Hence, the alveoli are responsible for absorption of oxygen into the blood.

Detailed explanation-2: -Every cell in your body needs oxygen to live. The air we breathe contains oxygen and other gases. The respiratory system’s main job is to move fresh air into your body while removing waste gases. Once in the lungs, oxygen is moved into the bloodstream and carried through your body.