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Comment upon the following: The urine ...

Comment upon the following:
The urine is slightly thicker in summer than in winter.

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In summer, water is lost from the body through sweating, To compensate for the loss, much water is reabsorbed by the kidney tubules and put back in blood and this makes the urine concentrated. In winter, all this water is lost from the body through urine only, that is why, is thinner.
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