Speaking of fart, everyone is familiar with it. Whether it's dark fart or loud fart, smelly fart or tasteless fart, everyone releases at least 500 ml of gas every day. However, farting is an embarrassing thing. People are always reluctant to put it on the table and seldom pay attention to it. But farting is a daily physiological phenomenon and an indicator of normal gastrointestinal peristalsis. Once the fart changes, it usually means some balance changes in the body, even lesions. Therefore, fart is a mirror of people's health, but don't treat this "fart" as "fart".
Let's talk about how fart is formed first.
The raw material of fart is air swallowed with our saliva or food. Some of them are discharged from the stomach through hiccups, and the rest of the air enters the intestine, which becomes the main source of fart. Therefore, people who are used to swallowing a lot of air with saliva fart more often than the average person. In severe cases, sometimes there will be more than half of the air in the stomach. Another source of fart is that the food people eat is fermented, decomposed and corrupted by intestinal flora, so some gas will be produced. Once these gases accumulate more, they will stimulate intestinal peristalsis. Driven by peristaltic waves, these gases are discharged from the anus and become fart.
Wu Ming, a gastroenterologist at Wanfang Hospital in Taiwan Province Province, said that there are four reasons for farting. Too much air, or carbohydrates in food are fermented by bacteria to produce gas. These two reasons are easy to "fart", that is, the number of farts increases; Protein in food is fermented by bacteria to produce gas, which is easy to "stink"; If the intestinal peristalsis is too fast, it is easy to fart a lot, and it is a "chain fart", one after another.
So, what's the composition of fart?
We know that the main components of air are nitrogen and oxygen. When the air in the stomach enters the intestine, the oxygen in it will be absorbed, and the remaining nitrogen will become one of the main components of fart intact. Scientific research has concluded that fart has 400 components. Surprisingly, it was NASA who did this research!
How does NASA's Apollo program study fart? It's incredible. But in fact, this is a very important issue in the internal management of spacecraft. If a person's fart contains flammable gas, it may be ignited in some cases if it is not handled properly in space, which may lead to the explosion or fire of the spacecraft. In addition, the spacecraft is a sealed space, and the air cannot be easily adjusted, so it is necessary to consider that astronauts may be poisoned by their own farts.
After careful study, NASA found that fart contains 400 components. The main components are odorless gases such as nitrogen, hydrogen, carbon dioxide, methane and oxygen, and a small amount of odorous gases such as ammonia, hydrogen sulfide, indole, fecal odor, volatile ammonia and volatile fatty acids. Except nitrogen and oxygen, most gases are made by intestinal bacteria.
The proportion of components contained in fart varies from person to person. For example, people with low nitrogen content only account for 23%, while people with high nitrogen content account for 80%.
Interestingly, the gas produced by intestinal bacteria can be discharged from other places besides turning into fart. Do you know this?
Sometimes, especially when the opposite sex you like is around, although you have a fart, you dare not let it out. Put up with it and don't want to let it out again. Most people have this experience. However, the fart I wanted to fart did not disappear somewhere. Where did this fart go? It comes out of the mouth with the exhaled air.
Of course, fart doesn't come out of your mouth intact. If there is, it will not only "pollute" the people around you, but even make you feel unbearable.
If you hold your fart, gas will accumulate in the intestine, but this gas can be exchanged with the gas in the blood of intestinal mucosa. Therefore, when the intestinal gas concentration is high, the gas will flow into the blood, be transported to the lungs by the blood, and be discharged out of the body together with the exhaled gas. This is the cause of bad breath.
But bad breath rarely stinks to the point of farting. What about other smells?
There is no doubt that ammonia, hydrogen sulfide, indole, fecal odor, volatile ammonia, volatile fatty acids and other odorous gases are mostly absorbed by the human body.
It is conceivable what terrible effects these substances will have on the body after being absorbed! As early as 1 1 century, doctors concluded: "People who insist on farting are in danger of edema, spasm, dizziness and hernia pain. Most of the time, these sad symptoms are just a matter of thought. " So, as long as the "conditions" allow, please fart boldly! As Cicero, an ancient Roman philosopher, said, "We should fart boldly, just like burping boldly.