Authors: Karim M. Khalil and Medhat A. Elayat
The testicular arteries are the main source of blood supply of the testis and epididymis. They are two slender vessels of considerable size; arise from the abdominal aorta. The topography and morphometry of the testicular artery in the spermatic cord and testis were studied using 120 specimens which were collected from four species of farm animals and prepared for corrosive cast technique using Epoxy. The course of the testicular artery among the different species of animals shows considerable species variations especially in its architectural pattern, distribution as well as the mode of its termination. Topographically, Testicular artery can be divided into three parts; abdominal, funicular and marginal parts along its course. The coils of the funicular part of the testicular artery forming a cone-like structure with its base fixed to the head of the testis. The bulk of the cone is built of several arterial loops, venous network of pampiniform plexus as well as the spermatic fascia. The increase in the length of the testicular artery with increase in the size of the testes played a great role in the degree of complexity of the architectural vascular pattern. The degree of complexity is affected by the number of coils formed by the vessel. The testicular artery appears more complex in species which have high temperature gradient between abdominal and testicular blood.
Keywords: Angioarchitecture, Testes, Testicular artery, Thermoregulation