What is the primary role of the human respiratory system?

Explanation

The respiratory system’s main function is to bring oxygen into the body and remove carbon dioxide, a waste product of cellular metabolism. Air travels through the nose or mouth, down the trachea, into the lungs, and finally reaches the alveoli, where gas exchange with the blood occurs. This continuous process supplies the oxygen needed by cells throughout the body to produce energy. Explore more Everyday Science MCQs on mcqstutor to keep practicing.