1. (noun) animal tissue that constitutes the essential part of an organ as contrasted with e.g. connective tissue and blood vessels

• animal tissue

2. (noun) 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

• plant tissue

1. (noun) 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

• chlorenchyma