Interesting Facts About Urine: Rats Use It To Mark Food As Edible!

Urine is hardly something you’d call interesting or useful, other than for expelling waste from the body. In fact, you probably don’t give urine or urination much of a thought, other than when you’re doing it or when you’re sick.
Urine is a liquid by-product of metabolism in the bodies of most animals, including human beings. It’s expelled from the kidneys and flows through the ureters to the urinary bladder, from which it is soon excreted from the body through the urethra during urination.
Cellular metabolism generates numerous by-products, many nitrogenous (rich in nitrogen), that require clearance from the bloodstream. These by-products are eventually expelled from the body during urination, the primary method for excreting water-soluble chemicals from the body.
These chemicals can be detected and analyzed by urinalysis. Of the many such substances that exist, the three main nitrogenous wastes of the mammalian body are urea, uric acid, and creatinine.
It is 95 percent water. The rest is 2.5% urea and a 2.5% combination of salt, hormones, nutrients, and creatine. Over a lifetime, the kidneys will clean approximately one million gallons of water into urine.
Everyone urinates, but not everyone has a good understanding of what urine is or how the body’s urinary system works. People are often unaware of certain basic facts about urine like its correct color or if there is pee on the moon.
Here are lesser-known interesting facts about urine:
1. Rats use urine to mark food as edible. Rats are remarkable creatures found all over the globe, and they use their urine for many different purposes, from leaving a personal ad to attracting a mate to urinating on each other to pick a mate and mark territory. They also use it to mark food as safe.
This is especially true of rats that have a massively varied diet. Rats don’t have the ability to throw up, so they really have to be careful that what they’re eating isn’t poisonous, and one method for doing this is urinating on or near food that is edible.
The urine contains an attractant that tells other rats, “I’ve eaten this, and it’s safe.” Other rats, mostly young ones, pick up on the attractant. Their affinity for the attractant wanes as they get older. So, it may seem pretty gross, but it’s better than being poisoned.
2. It’s illegal to pee in an elevator in Singapore, and some elevators have a Urine Detection Device which detects urine odors, sets off an alarm, and closes the elevator doors until the police arrive.
3. The ancient Egyptians used the urine from a pregnant woman to germinate seeds to determine the sex of the child. If barley sprouted first, then it was to be a boy. If wheat sprouted first, then it was to be a girl.
4. Urine should not be completely clear. The popular belief is that urine should have the appearance of water and that any yellowness is a sign of dehydration. The truth is that there should be some yellow, just not too much. Clear urine can be a sign of over-hydration.
5. There is urine on the moon. It’s currently home to more than 400,000 pounds of material made by humans. Included amongst the detritus are bags of feces and urine from the moon landings.
6. In WWI Canadian soldiers used urine-soaked cloths as primitive respirators against chemical attacks. The ammonia in urine would react with the chlorine, neutralizing it, and that the water would dissolve the chlorine, allowing the soldiers to breathe through the gas.
7. The average adult produces 6.3 cups of urine a day. The bladder can hold about 2.5 cups of urine at a time for up two to five hours. (That’s slightly larger than a pint of beer.) And you’ll usually start to feel the urge to pee when your bladder has about a cup full.
In comparison, a Clydesdale horse can urinate more than 72 cups a day — that’s 4.5 gallons! And an elephant? A whopping 208 cups or13 gallons.
8. You should not drink your urine. If you get lost in the desert without water, don’t drink your urine. It’s full of salt, which can actually make you more dehydrated instead of quenching your thirst. In fact, the US Army Field Manual strictly advises against drinking urine for survival.

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