DIGESTIVE SYSTEM - GLANDS-25 : LAYERS OF THE GALLBLADDER WALL: a. adventitia D b. serosa c. muscular d. mucosa e. submucosal

The correct answer is d. mucosa.<br /><br />The gallbladder is a small organ located beneath the liver that stores bile produced by the liver. The wall of the gallbladder is composed of several layers, and the innermost layer is called the mucosa. The mucosa is a thin layer of epithelial cells that line the interior of the gallbladder. It plays a crucial role in the absorption and secretion of bile. The other layers of the gallbladder wall, from outermost to innermost, are the adventitia, serosa, muscular layer, and submucosal layer.