AP BIOLOGY

Detailed explanation-1: -The alveoli cover a surface of more than 1, 399 feet (ft) or 130 square meters (m2) . This large surface area is necessary to process the huge amounts of air involved in breathing and getting oxygen to your lungs. Your lungs take in about 1.5 gallons (gl) or 6 liters (L) of air per minute.

Detailed explanation-2: -The alveoli are adapted to provide a very large surface area for gaseous exchange: small size: each alveolus is a small sphere about 300 m in diameter, giving it a larger surface area to volume ratio than larger structures. number: there are around 700 million alveoli-ie 350 million per lung.

Detailed explanation-3: -They provide total surface area of about 100 m2. A typical pair of human lungs contain about 700 million alveoli, producing 70m2 of surface area. Each alveolus is wrapped in a fine mesh of capillaries covering about 70% of its area.

Detailed explanation-4: -Alveoli increase the diffusion of gases between the lungs and the blood by enhancing the lung surface area.

Detailed explanation-5: -Alveoli in lungs improve gas exchange by increasing the surface area of the lungs.