|1.||unspecialized plant tissue consisting of simple thin-walled cells with intervening air spaces: constitutes the greater part of fruits, stems, roots, etc|
|2.||animal tissue that constitutes the essential or specialized part of an organ as distinct from the blood vessels, connective tissue, etc, associated with it|
|3.||loosely-packed tissue filling the spaces between the organs in lower animals such as flatworms|
|[C17: via New Latin from Greek parenkhuma something poured in beside, from |
parenchyma pa·ren·chy·ma (pə-rěng'kə-mə)
The distinguishing cells of a gland or organ, contained in and supported by the stroma.
parenchyma [%PREMIUM_LINK%] (pə-rěng'kə-mə) Pronunciation Key |
The basic tissue of plants, consisting of cells with thin cellulose walls. The cortex and pith of the stem, the internal layers of leaves, and the soft parts of fruits are made of parenchyma. In contrast to sclerenchyma cells, parenchyma cells remain alive at maturity. They perform various functions, such as water storage, replacement of damaged tissue, and physical support of plant structures. Chloroplasts, the organelles in which photosynthesis takes place, are found in parenchyma cells. Compare collenchyma, sclerenchyma.