PARTICIPATE OR NOT PARTCIPATE PARAPHYTES OF THE IInd TYPE OF DOGIEL CELLS IN THE INNERVATIONS OF INTESTIN MICRO VESSELS?

Abstract

A significant part of the II^nd type of Dogiel cells in the intestines of mammals have very short neuromatous processes of the cytoplasm - paraphytes, closely adjacent to the wall of blood and lymphatic microvasculature. They can be random or true afferent synapses of these neurons involved in the innervation of the intestinal vessels. The purpose of the work is to prove at the morphological level the participation of paraphytes of the II^nd type of Dogiel cells in the innervation of intestinal micro vessels. Total, impregnated by silver preparations of the wall of the small intestine of intact outbred cats (n=5) were studied. It was found that neurocytes located on the periphery of the ganglia have short, unbranched processes and form local contacts with the wall of micro vessels. At the microscopic level, these contacts are detected as clearly formed receptor structures in the form of preterminal or terminal plaques. Thin non-branching processes depart not only from the area of the pericarion of neurons, but also from paraphytes. It was also possible to detect the syncytial connections of these processes with the pericarions of adjacent neurons. Often, paraphytes with large lamellae were contacted with narrow cytoplasmic ligaments with pericarions. This suggests that such lamellae are potential cytomers in the area of the microvascular channel of the intestine. Parafites of the II^nd type of Dogiel cells are involved in the innervation of intestinal micro vessels and are potential cytomeres that contribute to the regeneration of cellular elements of the micro vessel wall.