Two structural adaptations of alveoli which make them well suited for gaseous exchange ?

1. Large surface area: Alveoli have a large surface area due to their small size and numerous tiny air sacs. This large surface area allows for a greater amount of oxygen and carbon dioxide to be exchanged between the alveoli and the blood.

2. Thin walls: The walls of the alveoli are extremely thin, consisting of a single layer of epithelial cells. This thinness allows for a shorter diffusion distance for gases to travel between the alveoli and the blood vessels, making the process of gas exchange more efficient.

1. Thin Walls: Alveoli have extremely thin walls, allowing for easy diffusion of gases between the air in the alveoli and the blood in the capillaries.

2. Large Surface Area: Alveoli have a vast surface area, created by their numerous folds and septa. This extensive surface area increases the contact area between the air and the blood, facilitating efficient gas exchange.

Which economic system is criticized for allowing some groups to accumulate huge wealth and play decisive role in the economy