Morphogenesis of the gall bladder — a mystery of the XXI century

Abstract

This discussion article presents the theoretical background and results of our own histological study of the ampulla of the papilla of Vater in various animals to explain the absence of the gallbladder in some animals. In particular, the authors studied the structure of the duodenal mucosa in rats and rabbits. They suggest that the evolutionary loss of the gallbladder in some animals is associated with the need for rapid movement in space and high maneuverability. The realization of these properties may be hindered by a fluid-filled organ.