Studies on the Pathogenesis of Tibial Dyschondroplasia in Chickens IV. Some Features of the Vascular Supply to the Growth Plates of the Tibiotarsus

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Abstract
Several features of the vascular supply to the growth plates of the tibiotarsus were compared in 2 strains of broiler chickens selected for a high and low incidence of tibial dyschondroplasia. No difference was found between the 2 strains in the area of the proximal growth plate of the tibiotarsus or in the distance of the nutrient foramen from the same growth plate. Vascular tunnels invading the zone of hypertrophy were significantly fewer in the proximal growth plate than in the distal growth plate, and tunnels invading the zone of hypertrophy of each growth plate were fewer in the high-incidence chickens than in the low-incidence chickens.