EMBRYOLOGY
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What are the names of the air sacs in the lungs where gas exchange takes place?
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Alveoli
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Bronchi
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Bronchioles
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Intercostal muscles
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Explanation:
Detailed explanation-1: -Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.
Detailed explanation-2: -There are about 300 million alveoli in both Lungs which increase the surface area for the exchange of respiratory gases.
Detailed explanation-3: -Gas exchange in the alveoli occurs primarily by diffusion. Traveling from the alveoli to capillary blood, gases must pass through alveolar surfactant, alveolar epithelium, basement membrane, and capillary endothelium.
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