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archenteron

^ http://purl.obolibrary.org/obo/XAO_0000092


The cavity of the gastrula forming a primitive gut. At NF stage 20-21 its wide canal becomes dorso-ventrally compressed and narrowed in the future trunk region so that a subdivision into a foregut, a midgut and a hindgut with protruding endodermal mass becomes manifest. [ https://www.worldcat.org/search?q=bn%3A0815318960 http://www.merriam-webster.com/medlineplus/archenteron ]