Comparative microscopical study of the gall bladder mucosa.

The gall bladder from 6 Psammophis sibilans, 10 Bufo regularis and 10 Albino mice were extracted and prepared for microscopic examination. It was found that the mucosa of Psammophis sibilans consisted of ovoid and polygonal cells which were occasionally binucleated cells with darkly stained nuclei and occasionally pear-shaped cells with vesicular nuclei and fine processes. These cells were arranged in three layers. Apossible explanation for the different types of cells encountered and their arrangement was given. The gall bladder mucosa of Bufo regularis and Albino mouse were thrown into folds covered with simple columnar epithelium. However, the epithelium of the frog was higher than that of the mouse, with the nuclei situated midway between basement membrane and the lumen. Vacuolated cells were detected in the gall bladder mucosa of the mouse. The significance of the mucosal folds was discussed.