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Gastro vascular cavity, as the name suggests, functions in both digestion and the distribution of nutrients and particles to all parts of the body. Organisms belonging to two major phyla, the Cnidaria, and the Platyhelminthes, possess gastrovascular cavities. The radially symmetrical cnidarians have a sac-like body in two distinct layers, the epidermis and gastrodermis, with a jellylike layer called the mesoglea between. Extracellular digestion takes place within the central cavity of the sac-like body. This cavity has only one opening to the outside and, in most cnidarians, that is surrounded by tentacles which serve to capture prey. Example: Digestion in hydra occurs in gastrovascular cavity.
Organisms with a gastrovascular cavity:
In Popular Culture
The gastrovascular cavity is mentioned during a human dissection or autopsy in the 1962 B movie "Ring of Terror". Obviously, this is a mistake, unless the deceased was a human-flatworm hybrid.
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