MICROANATOMY

Detailed explanation-1: -There are about 300 million alveoli in both Lungs which increase the surface area for the exchange of respiratory gases.

Detailed explanation-2: -The lung alveoli are the balloon-like air sacs loacted at the distal ends of the bronchial tree. There are as many as 700 million alveoli in each lungs, where they facilitate gaseous exchange of oxygen and carbon dioxide between inhaled air and the bloodstream.

Detailed explanation-3: -There are about 600 million lung sacs (alveoli) in your lungs.

Detailed explanation-4: -There are 300 million alveoli in the lungs, and these give approximately 140m surface area for the exchange of gases. The alveoli are responsible for the spongy nature of the lung. These alveoli are lined by flattened epithelial cells called pneumocytes with a single opening.

Detailed explanation-5: -There are approximately 300 million alveoli in the adult respiratory system, which have a total mean surface area of 143 m2 (Ochs et al., 2004). Each alveolus has an average diameter of 200 m and is composed of a single epithelial layer of cells and extracellular matrix surrounded by capillaries.