Atypical adult human lung contains about 330 million tiny cavities called alveoli. estimate the average diameter of a single alveolus. assume the alveoli are spherical and a typical human lung is about 1.9 liters.

The average diameter of a single alveolus is 0.0222 cm.

Explanation:

Volume of the lung ,V= 1.9 L

Number of alveoli in a human lung =

Volume of single alveoli =v

The alveoli are spherical.

Radius of an alveolus = r

Volume of the sphere =

Diameter of the alveolus =d

d = 2r = 2 × 0.0111 cm = 0.0222 cm

The average diameter of a single alveolus is 0.0222 cm.