aerenchyma

aer·en·chy·ma  (â-rngk-m) n. A spongy tissue with large air spaces found between the cells of the stems and leaves of aquatic plants, providing buoyancy and allowing the circulation of gases. [New Latin : aer(o)- + Greek enkhuma, filling (from enkhein, to pour in : en-, in; see en-2 + khein, to pour; see chyme).]

aerenchyma longitudinal section of an aquatic plant stem

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aerenchyma  (â-rngk-m)

A spongy tissue with large air spaces found between the cells of the stems and leaves of aquatic plants. Aerenchyma provides buoyancy and allows the circulation of gases.