Gastrodermis

 ( Cnidarian Anatomy ) 

Gastrodermis (from Ancient Greek: , , "stomach"; , , "skin") is the inner layer of cells that serves as a lining membrane of the gastrovascular cavity in . It is distinct from the outer epidermis and the inner dermis and is primarily associated with the ventral side of . It is composed of specialized cells responsible for several vital Physiology processes. The term is also used for the Analogy inner Epithelium layer of .

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Functions The gastrodermis has a role in many Biology functions, including respiration, , and digestion.

• The gastrodermis provides a large surface area for gas exchange to occur, via cutaneous respiration, which involves the exchange of oxygen and carbon dioxide through the skin.
• The gastrodermis contains specialised cells called , which are responsible for producing and controlling . These cells contain pigments such as melanin that help in coloration and camouflage.
• In Coelenterata, the gastrodermis contains mucus-secreting cells and gland cells that secrete to assist in digestion.
• The gastrodermis is among the sites where early signals of Coral bleaching are expressed in corals.

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