What occurs at the respiratory membrane?

Question

Quizplus · Accepted Answer

The respiratory membrane is where gas exchange occurs between the air in the alveoli and the blood vessels surrounding them. Oxygen diffuses from the air into the blood, while carbon dioxide diffuses from the blood into the air to be exhaled. Mucus and macrophages are involved in the respiratory system for other functions such as removing foreign particles and pathogens but not in gas exchange at the respiratory membrane. Gas exchange between blood and tissues takes place at the systemic capillaries, not at the respiratory membrane.

What Occurs at the Respiratory Membrane