Some features of alveoli are mentioned below. Select the INCORRECT option.

Correct option is D

The correct answer is (d) Are finger-like structures

Large surface area:

• Alveoli provide a large surface area for gas exchange, which is essential for efficient oxygen and carbon dioxide exchange.

Extensive network of blood vessels:

• Alveoli are surrounded by a dense network of capillaries for effective gas exchange.

Are Thin walled:

• The walls of alveoli are only one cell thick, allowing gases to easily diffuse across them.

Not finger-like structures:

• Alveoli are tiny sac-like structures, not finger-like, making this the incorrect statement.

The incorrect option is;

• "Are finger-like structures"​