50 When we hold in a fart, where does it go?
(A)It is absorbed by the intestines.
(B)It is released from the mouth or nose.
(C)It is just delayed and will come out later.
(D)It goes back to the stomach and helps with digestion.

To toot發嘟嘟聲, to cut the cheese我放屁了, or to pass gas放屁. These are all funny ways to talk about something that everyone does: Farts放屁! A normal person passes about half a liter（度量單位）升 of gas a day. That equals相同 about 14 farts per day.

Then where do farts come from? There are several sources of fart gas. We get fart gas from the air we swallow吞. Gas also goes into our intestines腸子 from our blood. In addition除此之外, gas is also produced from chemical reactions and bacteria living in our intestines腸子. Nervous people usually have more gas. This is because they swallow more air. Besides除了….之外, food goes through their digestive消化 systems faster. This means oxygen cannot be absorbed from the food in time及時. It turns into fart gas. People’s diet affects the stinkiness臭 of farts. The smell氣味  has to do with the sulphur硫 in foods such as eggs, meat, and cauliflower花椰菜. Beans cause a lot of farts, but these farts aren’t usually really stinky. Beans are not high in sulphur硫, but the sugar in them produces gas in the intestines腸子.

Finally, people wonder, “Where do farts go when you hold them in?” Well, these farts will not poison you.

However, you may get a bad stomachache from the pressure. Farts you hold in are neither released nor absorbed. They will come out sooner or later.

When we hold in a fart, where does it go? 
(A)It is absorbed by the intestines. 
(B)It is released from the mouth or nose. 
(C)It is just delayed and will come out later. 
(D)It goes back to the stomach胃 and helps with digestion消化.