What is "archenteron"

Archenteron \Arch`en"ter*on\, n. [Pref. arch- + Gr. ? intestine.] (Biol.) The primitive enteron or undifferentiated digestive sac of a gastrula or other embryo. See Illust. under Invagination.

n. (context anatomy English) A primitive alimentary cavity

n. central cavity of the gastrula; becomes the intestinal or digestive cavity

The primary gut that forms during gastrulation in the developing zygote is known as the archenteron or the digestive tube. It develops into the endoderm and mesoderm of an animal.