Morphofunctional Features of the Structure of Gastrointestinal Tract Spincters

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.

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