Question

Describe the mechanism of gaseous exchange in plants through lenticle?

Answer 1

ANSWER :

• The soft stems of small herbaceous plants have stomata in them and hard stem of big plants and trees have lenticels in them. Lenticels are in the small area of a bark. These cells are loosely placed and therefore allow the gaseous exchange of respiratory gases between air and living cells of the woody stem.

• Stomata help in the gaseous exchange of respiratory gases between stems of herbaceous plants and air. It is through stomata that oxygen from air diffuses into the stem and goes to all the cells of a stem for respiration.

• Stomata help in the gaseous exchange of respiratory gases between stems of herbaceous plants and air. It is through stomata that oxygen from air diffuses into the stem and goes to all the cells of a stem for respiration.Similarly, carbon dioxide produced in the stems diffuses into stomata of herbaceous plants and lenticels of trees or large plants and goes out into the air.

• The waste products of a plant are carbon dioxide, water vapour and oxygen. While carbon dioxide and water vapour are waste products of respiration, oxygen is a waste product of photosynthesis. These waste products are removed through stomata in leaves and lenticels in stems and are released into the air.

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