Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Proventriculus”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 721 records · Page 40Linked to original sources
PubMed1984

Differentiation of allantoic endoderm implanted into the presumptive digestive area in avian embryos. A study with organ-specific antigens.

Quail allantoic endoderm was implanted into the presumptive digestive-tract area of chick embryos, and the differentiation of the endoderm was examined morphologically and immunocytochemically with antisera against pepsinogens and sucrase. The allantoic endoderm was incorporated into the host digestive organs. It often became continuous with the host endoderm and formed a chimaeric digestive-tract epithelium. It differentiated morphologically into the epithelium of the digestive organ into which it was incorporated, showing the morphological inductive ability in situ of the digestive-tract mesenchyme against the allantoic endoderm. However, the allantoic endoderm did not produce pepsinogens even when it was incorporated into the host proventricular mesenchyme and formed well-developed proventricular glands. This result indicates that the heterotypic morphogenesis of the allantoic endoderm is not necessarily accompanied by the heterotypic cytodifferentiation. In contrast, the anti-sucrase antiserum-reactive cells often differentiated in the allantoic endoderm incorporated into not only the intestine but also other organs. This confirmed our previous observation that the allantoic endoderm has a tendency to differentiate into the intestinal epithelium in the heterologous environment.

Animals↗
PubMed1978

[The system of blood vessels in the glandular and muscular stomach of the chicken (author's transl)].

The vascular system of the stomach of the chicken was investigated by means of corrosion preparations as well as by light- and electronmicroscopic methods. The main vessels form a) an Intermuscular Plexus the outer longitudinal and inner circular layers of the muscle wall in the glandular stomach and b) a Subserous Plexus in the muscular stomach. In the glandular stomach the Interglandular Parietal Arterial Plexus I, situated below the Lamina muscularis mucosae I arises from the arteries which pass through gaps in the muscle wall. This Plexus I produces another plexus, the Interglandular Arterial Plexus II, located on top of the Lamina muscularis mucosae I. Both arterial plexuses are accompanied by venous plexuses, which convey the blood into a Subglandular Venous Plexus. -The vessels of the muscular stomach provide the predominant supply of blood to the muscle wall. The mucous membrane of the muscular stomach is vascularized far less than the one in the glandular stomach. -The hemodynamic relationships of the vessels of the hen's stomach and the significance of the fine structure of the subepithelial capillaries and venules for the exchange of materials are discussed.

Animals↗