enteron

The primitive enteron or undifferentiated digestive sac of a gastrula or other embryo.

The endoderm, on the other hand, gives rise to the lining of the enteron, and of the glands which open into it.

Enteric: relating to the digestive canal or enteron.

An outline drawing, from the ventral aspect, of the enteron of an embryo of 20 cm. length, at about the time of hatching; made from a dissection.

The former, to which they limited the use of the word coelom, and which is developed directly or indirectly from the enteron, is found in Annelida, Arthropoda, Echinodermata, Chordata, &c.