What is alveolus?

Alveolus are:

  • - 1. A small cavity or saclike dilatation
  • - 2. One of the honeycomb pits in the mucous membrane of the stomach.

pulmonary a. One of the minute, balloonlike air sacs at the end of a bronchiole in the lungs. Exchange of the gases or respiration takes place through the alveolar walls.

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