The ureter is a structure that moves urine from the kidney and into the urinary bladder where it is stored before we secrete that to outside of our body. Now let's move on to our renal artery. So basically, the renal artery is the blood vessel system that brings the oxygenated blood, the blood filled with nutrients and also filled with the waste products that must be secreted by that kidney. So the renal artery delivers oxygenated blood to the kidneys and it splits and it subdivides into these very tiny blood vessels known as APA arterios. And these are the blood vessels that bring the blood, the oxygenated blood to each one of these nephrons found along the entire medulla and cortex of the kidney. So if this is our nephron, this is our a ferrint arterial that ultimately comes from the renal arteries.