Conclusion of lifeprocess about root
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The roots of plants are under the ground but root cells also need oxygen to carry out respiration and release energy for their own use.
The roots of a plant take up air from the spaces between the soil particles. Root hairs are in contact with the air in the soil particles. Oxygen from the air in soil particles diffuse into root hair and reach all the cells of the root where it is utilised in respiration. Carbon dioxide produced in the cells of the root during respiration goes out through the same root hair by the process of diffusion.
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