Plants can survive without respiratory organs. Give reasons.
GeneralClass 12AllAnswered 27 Mar 2026
Answer
(i) Decentralized respiration:
Each plant part (root, stem, leaf) performs its own gas exchange with minimal inter-organ transport.
(ii) Low metabolic rate:
Plants have significantly lower oxygen demands compared to animals, except during photosynthesis when leaves utilize O₂ produced internally.
(iii) Short diffusion distances:
Living cells in plants are located close to the surface or have access to air spaces. In stems, cells are organized in thin layers with lenticels for gas exchange. Parenchyma cells create an interconnected air space network.
Thus, plants efficiently manage respiration without specialized organs.
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