Which structure in the human body is primarily responsible for gas exchange between air and blood?

Explanation

Gas exchange occurs in tiny air sacs in the lungs called alveoli, where oxygen from inhaled air passes into the bloodstream and carbon dioxide from the blood is released to be exhaled. The human lungs contain hundreds of millions of alveoli, providing an enormous surface area for efficient gas exchange. This process is essential for supplying oxygen to every cell in the body. Explore more Everyday Science MCQs on mcqstutor to keep practicing.