The gastrodermis is the inner layer of cells that serves as a lining membrane of the gastrovascular cavity of Cnidarians. The term is also used for the analogous inner epithelial layer of Ctenophores. It has been shown that the gastrodermis is among the sites where early signals of heat stress are expressed in corals.

What is meant by gastrodermis?

: the lining membrane of the alimentary tract of an invertebrate —used especially when the germ-layer origin is obscure.

What is epidermis and gastrodermis?

There are two tissue layers: the epidermis, which lines the outside of the animal, and the gastrodermis, which lines the inside of the animal. These layers are separated by a nonliving layer of elastic, gelatinous material known as the mesoglea, which provides structure and buoyancy without metabolic cost.