A love affair with cigars is like most affairs of the heart. We swoon over the beauty and elegance, but we never really know what makes us love--and we don't want to. To overanalyze a cigar, or a mate, is to destroy the mystery.
A blood urea nitrogen (BUN) test measures the amount of nitrogen in your blood that comes from the waste product urea. Urea is made when protein is broken down in your body. Urea is made in the liver and passed out of your body in the urine. A BUN test is done to see how well your kidneys are working.
The BUN test is conducted to check the functioning of the kidneys. The kidneys are a pair of organs that are tasked with the function of cleaning the blood. Blood is used as a transport medium for nutrients and hormones to various parts of the body. Blood is also used to remove wastes from these parts of the body.