What is alveoli?

A ) Small air sacs in the lungs ✅

B ) Outer passages of the lungs

C ) Part of bronchial tubes

D ) Part of blood vessels

Related Questions
  1. Which part of the respiratory system is commonly called the "windpipe"?
  2. Diaphragm is a thin skeletal muscle in body-----:
  3. The respiratory problem common in smokers is-----:
  4. What is the capacity of the lung?
  5. What is essential for proper lung function?
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