Which of the following parts of the human body releases carbon dioxide, brought in by the blood, from the rest of the body?

Options

A. Trachea
B. Alveoli
C. Larynx
D. Bronchi

Answer

B

Explanation

Alveoli are the center of the respiratory system’s gas exchange. The alveoli pick up the incoming energy (oxygen) we breathe in and release the outgoing waste product (carbon dioxide) we exhale. As it moves through blood vessels (capillaries) in the alveoli walls, our blood takes the oxygen from the alveoli and gives off carbon dioxide to the alveoli.