The renal veins carry blood away from the kidneys.
The renal arteries
renal vein
An artery takes blood away from the heart
arteries take blood away from the heart
aorta
The valve on the aorta (the vessel taking blood away from the heart) is called the "aortic valve".
Descending aorta
An artery.
The major arteries that take blood away from the heart are the aorta and pulmonary arteries.
C.S. Lewis developed kidney failure as a complication from sepsis caused by a ruptured blood vessel in his kidney. He ultimately passed away from this condition in 1963.
Aorta (the largest artery, carries blood out of the heart)
Efferent arteriole takes the blood away from the glomerulus
Renal veins
The renal artery takes blood to the kidney. The renal vein takes blood away from the kidney. In the kidney, the waste product urea is filtered out of the blood. So the main difference is in the amount of urea in the blood: high in the renal artery and low in the renal vein.