Question

Sort the following to trace the passage of air inside our body starting from nose. (Top)

• A. Nose
• B. Trachea
• C. Alveoli
• D. Blood

Answer 1

The air that we breathe in enters our body through the nose. From the nose, it enters the lungs through trachea. In the lungs, air ends up at alveoli. Exchange of gases happen between the alveoli and blood. Oxygen enters the blood by diffusion. The blood transports oxygen to all parts of the body.