Define blood urea nitrogen (BUN)?

or:Define blood urea nitrogen (BUN)?or:The blood urea nitrogen (BUN, pronounced \"B-U-N\") test is a measure of the amount of nitrogen in the blood i

or:Define blood urea nitrogen (BUN)?

or:The blood urea nitrogen (BUN, pronounced \"B-U-N\") test is a measure of the amount of nitrogen in the blood in the form of urea, and a measurement of renal function. Urea is a by- product from metabolism of proteins by the liver and is removed from the blood by the kidneys.

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