Explanation:

Alveoli are tiny air sacs present in the lungs where gas exchange occurs. The number of alveoli present in the lungs is very high, which serves the purpose of providing a large surface area for diffusion of gases. This is important because the process of respiration involves the exchange of gases between the lungs and blood. The alveoli provide a large surface area for this exchange to occur efficiently.

More area for diffusion:
The high number of alveoli in the lungs provides a large surface area for diffusion of gases. Oxygen from the air diffuses through the alveolar walls and into the bloodstream. At the same time, carbon dioxide diffuses out of the bloodstream and into the alveoli to be exhaled out of the body.

More space for increasing volume of inspired air:
The high number of alveoli also allows for the lungs to expand and increase in volume when we inhale, allowing for more air to enter the lungs. This is important for efficient gas exchange as it ensures that more oxygen can be taken in and more carbon dioxide can be expelled.

Making the organ spongy:
The high number of alveoli in the lungs also gives the organ a spongy texture. This allows the lungs to be flexible and accommodate changes in volume during breathing.

Increasing nerve supply:
While the high number of alveoli does not directly increase the nerve supply to the lungs, it does allow for more efficient gas exchange. This ensures that the body's cells receive the oxygen they need and allows for the removal of carbon dioxide, which can have harmful effects on the body if allowed to build up.

In summary, the high number of alveoli in the lungs provides a large surface area for diffusion of gases, allows for more space for increasing volume of inspired air, gives the organ a spongy texture, and allows for more efficient gas exchange, which is important for the body's overall health and function.