Urinary System

How and why do you urinate?

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2011-02-02 15:10:32

Urine is the body's way of eliminating fluid waste products.

Urine contains waste or excess materials and toxic substances.

Urine's main content is water. In fact 95 per cent of the urine

excreted is water. The other major and common constituents are

sodium - 0.4 per cent, ammonia - 0.05 per cent, phosphates - 0.6

per cent, urea - 2 per cent, sulfate - 0.2 per cent and creatine,

urobilinogen, casts, in minute quantities. Normally, only water

soluble substances are excreted in the urine.

Urine is produced by the kidneys as a process of cleaning the

blood and excreting the unwanted soluble waste products from the

body. The kidneys filter out the waste products such as toxins,

excess water and mineral salts from the bloodstream. They filter,

clean and purify about 150-180 liters of blood and recycles it

daily. The urine formed in the kidney is drained by ureter into the

bladder for storage. The urethra brings out the urine from the

bladder, when time and place permit thus you get the "urge" to

pee.


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