This volume, the sixth of the series, represents the natural counterpart of the previous volume, Ultra structure of the Digestive Tract. Unlike the latter, however, whose contents fell entirely within the domains of gastroenterology, Ultrastructure of the Extraparietal Glands of the Digestive Tract encom passes a few cognate sciences, such as hepatology, pancreatology, and even oral biology, which are usually dealt with separately. This allows, starting from cell biology, embryology, and comparative anatomy, a comprehensive survey of organs that have much in common both structurally and...