ANATOMY

Detailed explanation-1: -In six adult human lungs, the mean alveolar number was 480 million (range: 274-790 million; coefficient of variation: 37%). Alveolar number was closely related to total lung volume, with larger lungs having considerably more alveoli.

Detailed explanation-2: -Dunnill estimated a mean number of 286 million alveoli in a human lung of a 55-year-old female (27). In 32 human lungs aged 19 to 85 years, Angus and Thurlbeck estimated a mean of 375 million alveoli (28).

Detailed explanation-3: -A pair of human lungs typically consists of about 700 million alveoli, which are the basic units of respiration. It provides a surface for gas exchange to take place.

Detailed explanation-4: -There are about 300 million alveoli in both Lungs which increase the surface area for the exchange of respiratory gases.

Detailed explanation-5: -Alveoli are tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going. Although they’re microscopic, alveoli are the workhorses of your respiratory system. People have an average of 480 million alveoli in their lungs, located at the end of bronchial tubes.