Aerenchyma: A spongy or soft plant tissue with large air spaces found
between the cells of the stems and leaves of many aquatic plants, which
allows exchange of gases between the shoot and the root. Aerenchyma also
provides buoyancy, so the plants can easily float on the water.
Chlorenchyma: In some cases the parenchyma cells contain chloroplasts
and are called as chlorenchyma. These cells are meant for