Aerenchyma

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Aerenchyma

in plants, tissue incorporating large, gas-filled spaces interspersed with the cells in a characteristic pattern. These cells are mostly found in mesophytes that possess evolutionary adaptations to assist them in floating in an aquatic environment, and as a means of gaseous exchange in the organism. Aerenchyma cells are characterised by their cork like structure and a large air filled cavity where gaseous exchange can occur.