Parenchyma vs. Collenchyma — What's the Difference?

Parenchyma () is the bulk of functional substance in an animal organ or structure such as a tumour. In zoology it is the name for the tissue that fills the interior of flatworms.

A supportive tissue of plants, consisting of elongated living cells with unevenly thickened walls.

(Anatomy) The tissue characteristic of an organ, as distinguished from associated connective or supporting tissues.

(biology) A living, elongated, mechanical and flexible ground tissue with angular pectin depositions; present just under leaves, tendrils and stems of climbers; formed before vascular differentiation.

(Botany) A simple plant tissue, composed of thin-walled cells and forming the greater part of leaves, roots, the pulp of fruit, and the pith of stems.

A tissue of vegetable cells which are thickend at the angles and (usually) elongated.

(anatomy) The functional tissue of an organ as distinguished from the connective and supporting tissue.

(botany) The cellular tissue, typically soft and succulent, found chiefly in the softer parts of leaves, pulp of fruits, bark and pith of stems, etc.

(zoology) Cellular tissue lying between the body wall and the organs of invertebrate animals lacking a coelom, such as flatworms.

The soft cellular substance of the tissues of plants and animals, like the pulp of leaves, the soft tissue of glands, and the like.

Animal tissue that constitutes the essential part of an organ as contrasted with e.g. connective tissue and blood vessels

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 stems