[Changes in the distribution of urea in body fluids during growth].
Urea concentration in plasma, muscle, and liver fluids of Wistar rats at the age of 3, 6, and 12 weeks was determined. In rats at the age of 3 weeks urea was cumulated in liver and muscle tissue fluids, in older rats (6 and 12 weeks) in plasma fluid. According to the stated urea distribution in individual age categories, a higher urea transport from tissues to blood is considered to be in rats at the age of 6 and 12 weeks. The urea transport proved to be one of the mechanisms of facilitating better utilization of endogenous urea nitrogen in bio-synthetic processes of the nitrogen metabolism in ruminants as well as in monogastric animals.
D000818:Animals; D001826:Body Fluids / Q000378:metabolism*; D008099:Liver / Q000378:metabolism; D009132:Muscles / Q000378:metabolism; D051381:Rats / Q000254:growth & development* / Q000378:metabolism; D014508:Urea / Q000097:blood / Q000378:metabolism*
D014508:Urea
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