The medial liver trabecula into which the enteron was seen to open, in the preceding figure, now opens ventrally to the yolk-sac as the anterior intestinal portal.
Because of the lack of properly fixed tissue no sections of the enteron of this stage were made.
As in the preceding reconstruction no attempt is made to show the gill clefts, and only the dorso-ventral profile of the enteron is shown.
As seen in the figure the enteron is here wide from side to side, and is depressed dorso-ventrally except for a wide groove in the ventral wall.
This cavity is a part of the system of hollow liver trabeculae seen as a group of irregular masses of cells ventrad to the enteron at the opening of the anterior intestinal portal.
Figure 6A represents a reconstruction, from a series of transverse sections, of the enteron of an embryo of about the age of the one shown in figure 6.
In the present paper the development of the enteron is described in detail, but the derivatives of the digestive tract (liver, pancreas, lungs, etc.
A distinct mesentery holds the loops of the intestine in position and binds the entire enteron close to the dorsal body wall.
The union of the allantois and the gut accounts for the elongated outline of the enteron in this section.
The first indication of the formation of the enteron is seen in the very early embryo shown, from the dorsal aspect, in figure 1.
Figure 7 represents a reconstruction of the enteron of an embryo of 42 mm.
The mass of the arch-enteron or invaginated endodermal sac has taken on a bilobed form, and its cells are swollen (gs and tge).
Arch-enteron or cavity lined by the enteric cell-layer or endoderm.
A resemblance to the other Echinoderm larvae is found in the fact that coelomic diverticula of the enteron are present.
The Enteropneusta present us with the clearest case of the separation of five sacs from the primitive enteron (W.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "enteron" in a variety of sentences. We hope that you will now be able to make sentences using this word.
