Urea is found primarily in the urine of mammals, but it also exists in other bodily fluids and tissues.
Here's a more detailed breakdown:
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Urine: Urea is the chief nitrogenous end product of protein metabolism in mammals and is excreted in urine. This is its primary route of elimination from the body.
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Blood: Urea is present in the blood as it travels from the liver (where it's produced) to the kidneys for excretion.
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Bile: Although not its primary location, urea can be found in bile.
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Milk: Urea is present in milk.
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Perspiration (Sweat): Urea is excreted in sweat.
In essence, urea is a byproduct of the breakdown of proteins and is found throughout the body until it is filtered out by the kidneys and excreted in urine.
