| 2. | parenchyma - the primary tissue of higher plants composed of thin-walled cells that remain capable of cell division even when mature; constitutes the greater part of leaves, roots, the pulp of fruits, and the pith of stemspith - soft spongelike central cylinder of the stems of most flowering plants root - (botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground foliage, leaf, leafage - the main organ of photosynthesis and transpiration in higher plants | |