[Arterial vascular bed of the human mesenteric lymph nodes]

The anatomy of the blood vessels has been studied in 394 mesenteric lymph nodes macro- and microscopically. Morphometrical measurements of the size and diameter of the nodes have been performed in the intraorganic arteries of all orders of branching. Correlative connections existing between the size of the nodes and the number of the arteries supplying them with blood, between the size of the nodes and the diameter of the arteries feeding them, between the number of the hiluses and the number of the arteries supplying the lymph node with blood have been determined. As the results of the investigation demonstrate, the mesenteric lymph nodes having various localization differ in their size and form. The number and diameters of the arteries getting into the nodes via the hilus and the capsule vary within a wide range. There are two (often) or three (seldom) hiluses. One - three arteries get into one hilus. The structure of the intraorganic arterial vessels in the mesenteric lymph nodes is complex and variable, depended on the form of the nodes, number and position of the hiluses, on the type of blood supply and on the branching of the arteries getting into the nodes via the hiluses. In most of the mesenteric lymph nodes there are four orders of branching of the intraorganic arteries, each of them having a specific type of division into branches. All the intraorganic arteries either are situated within the trabecular connective tissue or are surrounded with elastic and collagenous fibres. The arteries of various order are differently connected with the structural-tissue elements of the lymph nodes. There are various variants in blood supply of the lymph node folliculi. The arterial vessels of the human mesenteric lymph nodes have a twisty course.