Oxygen Diffuses from the Alveoli into The

Question

Oxygen diffuses from the alveoli into the
A) bronchioles.
B) trachea.
C) pulmonary capillaries.
D) eustachian tube.

Accepted Answer

Oxygen diffuses from the alveoli into the pulmonary capillaries, where it will bind to hemoglobin and be transported to the body's tissues. The bronchioles and trachea are part of the respiratory system, but they are not involved in gas exchange with the blood. The eustachian tube connects the middle ear to the pharynx and is not involved in respiration.