The Suprarenal veins are two in number:Diagram showing completion of development of the parietal veins.Suprarenal glands viewed from the front.Suprarenal glands viewed from behind. The Suprarenal veins are two in number: They receive blood from the adrenal glands and will sometimes form anastomoses with the inferior phrenic veins. This article incorporates text in the public domain from page 679 of the 20th edition of Gray's Anatomy (1918)