Question

which structure is responsible for gas exchange and respiration in plants?

Answer 1

Hi frnd,

Exchange of gases takes place in the plants through the tiny pores on the surface of their leaves called stomata.

The exchange of gases also occurs in the roots of plants. They do so by taking in oxygen from the air spaces present in soil. This oxygen enters the root hairs through diffusion and then it reaches other cells of roots for respiration. Carbon dioxide produced during respiration move outside through the root hairs in the same way by the process of diffusion.

I hope it is helpful for you

Answer 2

The leaf's structure is optimized for gas exchange.

How does gas exchange occur in plants?

• Plants breathe continuously, but photosynthesis occurs only during the day.
• This indicates that the net gas exchange from a leaf is affected by the amount of light.
• The cells of the spongy mesophyll (bottom layer) are loosely packed and coated by a thin coating of water.
• On the surface of the leaf are microscopic holes known as stomata.
• The majority of these are in the lower epidermis, away from direct sunlight.

Stomata:

• A stoma, also known as a stomate in botany, is a hole located in the epidermis of leaves, stems, and other organs that regulates the rate of gas exchange.
• The hole is surrounded by a pair of specialized parenchyma cells known as guard cells, which regulate the size of the stomatal opening.

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