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Question

What are the structure and function of alveoli?


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Solution

Alveoli:

The tiny sacs found in the lungs, which exchange carbon dioxide and oxygen are known as alveoli.

Structure of alveoli:

  1. They are tiny-balloon-shaped compositions.
  2. They are the tiniest compositions in the respiratory system.
  3. The alignment of alveoli takes place in the form of clusters all through the lungs.
  4. They are positioned at the terminals of the branches of the respiratory tree.
  5. The walls are very thin, which permits oxygen and carbon dioxide to pass readily between the capillaries and alveoli.

Functions:

  1. It is the composition from where the blood and lungs exchange carbon dioxide and oxygen at the time of breathing in and out.
  2. The oxygen breathed in passes via the alveoli and into the blood and mediates to the tissues all through the body.
  3. The carbon dioxide passes through the blood from the tissues of the body and passes via the alveoli to be breathed out.

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