Light microscopy and scanning electron microscopy study on microstructure of gallbladder mucosa in pig

Abstract

The present light microscopy (LM) and scanning electron microscopy (SEM) studies on porcine gallbladder mucosa provide a description of the microstructures of great functional importance such as mucosal folds, the epithelium, glands, and lymphatic nodules. The results showed the regional structural differences of the porcine gallbladder wall. Depending on the part of the gallbladder, three types of mucosal structures were described: simple and branched folds and mucosal crypts. An important structural feature found in the mucosa is connected with the structural variety of type of mucosal folds, which change from simple located in the neck, to most composed, i.e., branched or joined, in the polygonal crypts toward the fundus of the gallbladder. The morphometric analysis showed statistically significantly differences in the form and size of the folds and between the fundus, body, and neck of the gallbladder. Differences in the size of mucosal epithelium are discussed in terms of processes of synthesis and secretion of glycoproteins. Regional, species-specific differences in morphology of mucosal subepithelial glands, i.e., their secretory units and openings, and intensity of mucus secretion were described. Our results on the pig gallbladder show adaptation and/or specialization in particular areas of the mucosa for (1) secretion of mucus in the neck or body of gallbladder and (2) for cyclic volume changes, especially in the fundus of gallbladder. The description of the microstructures of mucosa in the porcine gallbladder could be useful as reference data for numerous experiments on the bile tract in the pig.

Clinical peculiarities of course of ischemic heart disease depending on gallbladder condition in patients, who underwent coronary bypass surgery

“…Так, у ній слизова оболонка утворює спіральну складку, яка зникає за умов розтягнення. У шийці є більша частка сполучної тканини, ніж в інших відділах, у ній є залози, відсутні в інших відділах міхура, та наявні два судинних шари як в усіх жовчних протоках -власні капіляри та артеріоли з венулами[5].…”