The major blood supply to the testes comes through the:

Testis arise from poions of the wolffian bodies on the genital ridge close to the kidneys; therefore, the major blood vessels from the testes arises from the aoa just below the renal aeries and are termed the internal spermatic aeries. Secondary blood supply to the testes comes from the aery of the vas deferens, and a small branch from the epigastric aery termed the external spermatic aery forms during descent of the testes from the abdomen to the scrotum. The surgical impoance of this phenomenon is that operations involving the region of the renal aeries may sacrifice the internal spermatic aery.