Testicular artery

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The testicular artery ( Latin for "testicular artery") is an artery in male individuals that arises from the abdominal aorta on both sides and supplies the testicles , epididymis and the beginning of the vas deferens . The discharge occurs on both sides below (in animals behind) the renal artery (renal artery) in the lumbar region. The homologous blood vessel in female individuals is called the arteria ovarica (ovarian artery ).

The large distance between the origin of the artery and the target organ is due to the embryonic structure of the testes. These initially develop beneath the kidneys and, in most mammals, migrate into the scrotum during the fetal period . During this testicular descent , the artery elongates accordingly.

course

From the origin of the artery, it runs together with the vein of the same name ( vena testicularis ) on the back wall of the abdominal cavity in a serosa fold ( plica vasculosa or mesorchium proximale ) to the inner inguinal ring . When the ureter crosses , it gives off rami ureterici to it. At the inner inguinal ring it exits the body cavity through the inguinal canal and forms the spermatic cord ( funiculus spermaticus ) with the other conduction structures of the testicle . In the distal part of the spermatic cord it tangles up strongly, which is known as a cluster of tendrils (for details see the spermatic cord ).

In the area of ​​the testicle head, the artery releases branches for the epididymis ( rami epididymales ) and spermatic duct ( rami ductus deferentialis ). The artery itself runs along the edge of the epididymis ( Margo epididymalis ) to the tail end ( Extremitas caudata ) of the testicle. Here it turns over and runs in most mammals on the free edge ( Margo liber ) of the testicle back to the head end ( Extremitas capitata ) of the testicle.

From this terminal branch go out numerous branches, which are winding in the tunica albuginea of the testicle. From here, branches move centripetally into the inside of the testicles to the mediastinum testis , where they flip over and then pull centrifugally outwards again to open into the capillary networks around the testicular tubules .

Individual evidence

  1. FCAT - Federative Committee on Anatomical Terminology: Terminologia Anatomica. Thieme, Stuttgart et al. 1998, ISBN 3-13-114361-4 .

literature

  • Uwe Gille: Cardiovascular and immune system, Angiologia. In: Franz-Viktor Salomon, Hans Geyer, Uwe Gille (Ed.): Anatomy for veterinary medicine. Enke, Stuttgart 2004, ISBN 3-8304-1007-7 , pp. 404-463.