Division of the XXXX gastric mucosa into zymogenic and mucous regions on the basis of gland features.

@entity19 @entity9358 @entity5932 @entity2659
The stomachs of adult @entity2659 @entity19 were investigated by anatomical examination and light microscopy. Serial sections were prepared of entire stomachs; the various types of gastric glands were characterized; and, using every 30th or 60th serial section, maps of gland distribution were obtained through point-plotting serial reconstruction. Gross examination shows that the cephalic third of the stomach consists of a thin-walled, domelike structure, the forestomach. The rest of the organ, or stomach proper, is subdivided into two parts, the thick-walled corpus, which approximately occupies the middle third, and the less vascular pyloric antrum which forms the remaining caudal third of the organ. Histologically, glands are absent from the @entity5932 but are numerous throughout the stomach proper. They are of two main types, namely, zymogenic glands, which contain, among others, zymogenic cells, and @entity9358 , which lack these cells but contain mucous cells. Both gland types show a few enteroendocrine cells. Moreover, some of the @entity9358 include parietal cells (mucoparietal glands), while others do not (pure @entity9358 ). Mucosal maps reveal that the glands of each type are located in distinct areas of the mucosa. Thus a compact zymogenic region may be defined, occupying 56% of the glandular mucosa and containing only zymogenic glands. The mucous region, on the other hand, composed only of @entity9358 , is extensive and divided into a narrow cephalic band (5.2% of the glandular mucosa) and a large caudal part (38.8%). Along the lesser curvature these parts are continuous, and together they encapsulate the zymogenic region. In proximity to the border of this region, and only there, do the @entity9358 include parietal cells. A comparison of mucosal maps and gross features indicates that the corpus includes both the zymogenic region and the cephalic band of @entity9358 , whereas the antrum is composed entirely of the @entity9358 of the caudal part.
