Kidney Anatomy External Editor · Aug 30, 2017 · « Back Next » License Image The renal artery, renal vein and ureter enter the kidney via the hilus. The kidney and it’s vessels are embedded in a mass of fatty tissue called the perirenal fat which extends into a central cavity, the renal sinus. See Also:Renal Blood VesselsKidney Anatomy InternalAtherosclerosis of the Renal Artery