[The vasa vasorum in the veins of the spermatic cord]

Vasa vasorum is a vascular ensemble with nutritional role for the vascular wall. It's has the origin and the end at the surface of the bloods vessels. In the thickness of the external and internal tunics it represents by a capillary circulatory network. At the level of the adventitia of the veins, arterial vessels and vessels with a larger size, with a similar structure with the veins, has been observed. At the level of the middle tunic was observed capillary vasa vasorum. The density of the capillaries is bigger to the external tunic and the capillaries are in a smaller number to the internal tunic. The vascular wall has an intense metabolism, so we can explain the nutrient supply with two sources: an external source (vasa vasorum) and an internal source (the blood that flows in the vessels). The spermatic veins collect the blood from the testis, epididymis and the scrotum. This veins form a network around the arteries with a known functional role. This intimate vascular relation from the spermatic cord explains the arterial vasa vasorum particularities moreover the venous particularities. The drainage of the testicular veins is different on the left side and on the right side. The discussions are centered on the tension of the vascular wall. Its growth has an important effect: the compression of the capillary vasa vasorum. We discuss, too, about the conditions that reduce the perfusion. The consequence of an insufficient nutritional supply is the functional modification illustrated by varicocele.