Gastrovascular cavity

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Gastrovascular cavity

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The gastrovascular cavity is the primary organ of digestion and circulation in two major animal phyla: the Cnidaria (including jellyfish and corals) and Platyhelminthes (flatworms). The cavity may be extensively branched into a system of canals. In cnidarians, the gastrovascular system is also known as the coelenteron, and is commonly known as a "blind gut" or "blind sac", since food enters and waste exits through the same orifice. 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 which, in most cnidarians, is surrounded by tentacles for capturing prey.

English Wikipedia http://en.wikipedia.org/wiki/Gastrovascular_cavity

Wiki page external link https://books.google.com/books%3Fid=iOI9ifbikoQC&pg=PA126&dq=%23v=onepage&q&f=false%7Cchapter=Cnidaria https://archive.org/details/conciseencyclope00scot%7Curl-access=registration https://archive.org/details/conciseencyclope00scot/page/376