The respiratory surface where gas exchange occurs is in the

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Quizplus · Accepted Answer

Alveoli are small, air-filled sacs found at the end of the bronchioles in the lungs. They are the main site of gas exchange, where oxygen and carbon dioxide are exchanged between the lungs and the bloodstream. The trachea and bronchioles are part of the respiratory system but do not contain the respiratory surface, and the pharynx is a passage for air and food but not where gas exchange occurs.

The Respiratory Surface Where Gas Exchange Occurs Is in the