Home › Forums › Biology › Which of the following BEST describes what alveoli are?

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  • July 19, 2021 at 12:35 pm #9868
    hemanthk
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      A. They are the smallest tubes in the respiratory system.
      B. They have a small amount of surface area.
      C. They are found on the end of bronchioles.
      D. They are comprised of millions of cells.

      July 19, 2021 at 12:37 pm #9871
      hemanthk
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        Answer: C
        They are found at the end of bronchioles.
        Explanation :
        The alveolar sac is a compartment that aids in increasing the surface area available for gas exchange. It allows carbon dioxide and oxygen to be exchanged between the lungs and the circulation.

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