Why do people fart?

"A loud fart doesn't stink, and a smelly fart doesn't make a sound." Although this is just a joke, the gas expelled through the digestive tract is indeed not very popular. So: Why do people fart? ? In fact, farting is a normal physiological phenomenon of the human body. If a person does not pass gas for a day, his stomach will feel uncomfortable due to flatulence. A normal person's digestive tract often maintains 100 to 150 ml of gas. Since these gases are constantly produced and discharged, the amount of gas passing through digestion every day is sometimes as high as 2,000 to 4,000 ml. There are three main sources of gas in our digestive tract: 1. Air entering the body from the nose or mouth through breathing, eating, talking, etc. 2. Carbon dioxide in the blood will diffuse into the digestive tract and mix with the existing gas. 3. Some foods will produce gas after decomposition, such as sweet potatoes, potatoes, beans and other foods. According to research by medical experts, most of the gas in the digestive tract is in the large intestine and part of it is in the stomach. However, because of the good absorption capacity of the small intestine, only a small amount of gas exists. The gas in the stomach mainly comes from swallowing, and its composition is similar to that of air. As for the gases present in the large intestine, they are mainly carbon dioxide and nitrogen, with some oxygen, hydrogen and methane. Some bacteria in the large intestine will also produce special odors when they ferment. When they are mixed with the gases, they will produce odor. When these gases are present in the large intestine and are discharged through the anus, they naturally become stinky. Although farting is a normal phenomenon, farting in public places is not only unhygienic but also impolite, so before you "act", it is best to avoid it first. In addition, regular meals, eating more easily digestible foods, and developing good bowel habits can smooth our digestive tract and reduce the production of gas. In this way, the chance of farting will be greatly reduced! View original post gt; gt;