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The whole alimentary, or enteric, canal.

The primitive enteron or undifferentiated digestive sac of a gastrula or other embryo. See Illust. under Invagination.

All that part of the alimentary canal which is developed from the primitive enteron and is lined with hypoblast. It is distinguished from the stomod, a part at the anterior end of the canal, including the cavity of the mouth, and the proctod, a part at the posterior end, which are formed by invagination and are lined w…

The primitive perivisceral cavity.

Relating to the archenteron; as, archenteric invagination.

The pore or opening leading into the cavity of invagination, or archenteron.

Of or pertaining to the enteron, or alimentary canal; intestinal. Enteric fever (Med.), typhoid fever.

lled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastræa. -- a.

An intenstine; a bowel; the whole alimentary canal; the enteron; (pl.) bowels; entrails.

Of or pertaining to both the neuron and the enteron; as, the neurenteric canal, which, in embroys of many vertebrates, connects the medullary tube and the primitive intestine. See Illust. of Ectoderm.

See Mesenteron.

A part of the alimentary canal. See under Mesenteron.