Answer:
Step-by-step explanation:
The BUN test or blood urea nitrogen test measures the concentration of urea and nitrogen present in the blood. This describes how well the two kidneys in the body are functioning. Urea and nitrogen are the two waste products produced by the liver that travels through the blood to the kidneys. The test is done by drawing blood out of your body through a vein of the arm. The small amount of urea and nitrogen in the blood can be considered as normal the excess urea and nitrogen in the blood indicate s that it is not filtered by the kidneys.