[Formation of the muscular and neural components of the femoral artery wall of the dog in early postnatal ontogeny (an ultrastructural and histochemical study)].
In puppies of various age (newborn, 2-week-old. 1- and 3-month-old) formation of smooth muscle and neural components in the femoral artery wall has been studied electron microscopically and histochemically. As demonstrate the electron microscopic data, the femoral artery wall is mainly formed by birth, nevertheless, structural components of its each tunic are at various stage of maturation and only by the 3d month the differentiation and specialization process of all cellular elements is fully completed. Owing to a combination of techniques used, it has been possible to follow the dynamics in formation of the innervation apparatus of the femoral artery. In the newborn animals the adrenergic apparatus of the femoral artery is presented mainly as thick fibers of a cable type; they form a plexus with loose loops at the periphery of the external tunic. Varicosities are scanty. By the 3d month there is a well developed network of the adrenergic fibers at the border of the middle and external vascular tunics. Some terminals penetrate into the muscular tunic. There is a great number of varicosities in the neural fiber axons. At the border of the middle and external tunics of the vessel, complex neuro-muscular interrelations are forming with an aim to bring functionally closer the main structural components of the wall. In the course of the early postnatal ontogenesis in dogs up to 3 months of age, in the femoral artery wall certain processes take place directed to ensure the neuroregulatory vasomotor properties of the vessel.
D000320:Adrenergic Fibers / Q000378:metabolism / Q000648:ultrastructure*; D000818:Animals; D000831:Animals, Newborn; D004285:Dogs / Q000254:growth & development*; D005263:Femoral Artery / Q000254:growth & development* / Q000378:metabolism / Q000648:ultrastructure; D006651:Histocytochemistry; D008854:Microscopy, Electron; D009131:Muscle, Smooth, Vascular / Q000378:metabolism / Q000648:ultrastructure*
Formirovanie myshechnogo i nervnogo komponentov stenki bedrennoĭ arterii u sobak v rannem postnatal'nom ontogeneze (ul'trastrukturnoe i gistokhimicheskoe issledovanie).