For normal functioning, humans and animals must continuously receive information about changes in their surrounding environment and their own internal environment and respond promptly to it. In this regard, in the process of evolution in the body of animals and humans, special systems have arisen, for which the name sensory systems is most often used nowadays. Accordingly, the sensory systems of animals and humans were divided into two groups: extrasensory systems and sensory systems of the internal environment – visceral sensory systems.Based on modern scientific data, this book presents materials on the functioning of sensory systems at the cellular and molecular levels that regulate the work of internal organs – visceral sensory systems. Detailed information on the morphofunctional characteristics of peripheral and central sensory receptors of visceral sensory systems is presented. Data on the pathways of sensory information from receptors and its processing in the central nervous system are presented.