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The sources of vascularization of the kidneys and oviducts of 5 carcasses of Peking duck were studied by pouring vessels through the femoral artery with SKS-65 latex and fixation in 4% aqueous formaldehyde solution and further preparation. As a result of the studies, it was found that within the parenchyma of each renal lobe, the intra-organ arteries branch in the main caudomedial, dorsomedial and lateromedial directions and are divided into segmental and interlobular arteries, and peritubular capillaries. Arteries of the oviductal magnum enter it at an acute angle from the side of attachment of the mesogastrium, participating in the formation of the dorsal ovarian artery, from which the arteries extending in the transverse direction are separated, covering the magnum in the form of rings and form the ventral ovarian artery. Both arteries lie on the dorsal and ventral surfaces of the oviduct, forming well-developed collaterals. All arteries form a plurality of arcuate anastomoses, but in the caudal part, the arteries are long, run parallel to each other along the longitudinal bundles of muscle fibers, forming long longitudinal anastomoses between them. Intra-organ arteries include arteries that extend perpendicularly from the dorsal and ventral ovarian arteries, forming 2-5-order capillaries on the lateral surface of the oviductal magnum parallel to the bundles of muscle fibers on the lateral surface of the magnum, while forming a fine network of numerous and well-developed anastomoses that form the surface and deep layers. Intraorgan arteries pass first under the serous membrane of the oviduct, then penetrate the muscle and mucous membranes, branch into them, forming the subserous, intermuscular and mucous plexuses. All arterial vessels of the oviductal magnum have a strongly convoluted course, and also form numerous anastomoses between themselves, forming a three-dimensional microvascular network. Keywords—birds, arteries, kidneys, oviduct, magnum.

Features of Arterial Blood Supply to the Kidneys and the Oviductal Magnum in Peking Duck