Multiple choice

Where does the oxygen carried through inhalation ultimately reach?

  1. Bronchioles

  2. Bronchus

  3. Trachea

  4. Alveoli

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Found in the lung parenchyma, the pulmonary alveoli are the terminal ends of the respiratory tree, which outcrop from either alveolar sacs or alveolar ducts, which are both sites of gas exchange with the blood as well.