RESPIRATORY SYSTEM
BRONCHIOLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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I and II only
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I only
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II and III
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I, II, and III
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Detailed explanation-1: -Option (II) thin walls are correct.
Detailed explanation-2: -Adaptations of the alveoli: Thin walls-alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls-gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls-allow gases to pass through.
Detailed explanation-3: -Each alveolus is cup-shaped with very thin walls. It’s surrounded by networks of blood vessels called capillaries that also have thin walls. The oxygen you breathe in diffuses through the alveoli and the capillaries into the blood.
Detailed explanation-4: -The sac-like structure of the alveoli increases their surface area. In addition, the alveoli are made of thin-walled parenchymal cells. These features allow gases to easily diffuse across the cells.
Detailed explanation-5: -They have a large surface area relative to the volume of the organism. They are thin and so have a short diffusion pathway. They have a moist surface where gases can dissolve first before they diffuse in or out. More items