Morphofunctional Features of the Structure of Gastrointestinal Tract Spincters
Abstract
All sphincters of the gastrointestinal tract were divided into external and internal exercises, and both were divided into muscular and muscular-vascular ones. Musculo-vascular, in turn, were divided into musculo-venous and musculo-arterial. Musculo-vascular sphincters, due to the presence of peculiar venous structures in the submucosa or due to the significant density of arterial capillary networks, provide a better sealing of the lumen of the transition zones in comparison with simply muscle sphincters. The main structural sphincters are: a thickened circular layer of the muscular membrane, its uneven thickness around the circumference, the presence of an angle between adjacent organs, well-developed glands, lymphoid formations, vascular and intermuscular plexus; Morphologically, the sphincter of the alimentary canal is complex - a combination of education.