WBCS.LIVE practice question

Which part of the human respiratory system exchanges gases?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Bronchi
  2. Trachea
  3. Bronchioles
  4. Alveoli

Correct answer and explanation

Correct answer: Alveoli

Explanation: āœ… Correct Answer: D) Alvoeli šŸ“š Explanation: The alveoli are microscopic, grape-like air sacs located at the end of the bronchioles within the human lungs. They form the primary site where the exchange of respiratory gases occurs. Oxygen from inhaled air diffuses across the thin alveolar membrane into the bloodstream, while carbon dioxide waste moves from the blood into the alveoli to be exhaled. Their massive surface area ensures highly efficient respiration.