GENERAL HISTOLOGY

Detailed explanation-1: -The two lungs may contain as many as 700 million alveoli, providing a huge total surface area for gas exchange to take place. In fact, alveoli in the two lungs provide as much surface area as half a tennis court! Each time you breathe in, the alveoli fill with air, making the lungs expand.

Detailed explanation-2: -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-3: -Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.

Detailed explanation-4: -Lungs contain approximately 2, 400 kilometres of airways and 300 to 500 million air sacs (alveoli). If stretched out, the total surface area of lungs would be about the same size as half a tennis court. There are about 600 million lung sacs (alveoli) in your lungs.

Detailed explanation-5: -6 Liters of Capacity How much air they hold is called lung capacity and varies with a person’s size, age, gender and respiratory health. The maximum amount of air an average adult male’s lungs can hold is about six liters (that’s the same as about three large soda bottles).