The Adventures of Beans 8th Grade Composition

Hello everyone:

I am a bean, a bean that has passed through the human body. Do you want to hear my experience?

When I grew up, I was picked by farmers, transported to the vegetable market with my companions, and bought by an elegant man. The next day, he made porridge for me and my companions. Maybe there was an emergency at the company, so he didn't even chew more, so he swallowed me and entered his esophagus. My experience begins!

First, I came to the stomach. The nerves in the gastric wall felt my arrival and immediately ordered the gastric wall to secrete hydrochloric acid and pepsin. You must not understand: What about gastric acid? The so-called gastric acid is hydrochloric acid, which is just in the stomach and is used to digest the body. Pepsin dissolves the protein in the tough body. When the two are combined, it can also be referred to as gastric acid. Note, this is a strong acid that can digest any flesh with a sizzling sound! But, you asked: Isn’t the stomach wall flesh? Yes, the stomach wall is flesh, but there is also a layer of gastric mucosa on the flesh! Now you understand, if Helicobacter pylori uses "ammonia gas explosive" to destroy the gastric mucosa, and the gastric acid directly digests the stomach wall, it would be strange if you don't have stomachache! Fortunately, the stomach wall has an automatic repair function to prevent the attack of gastric acid. But at this time, alcohol and irritating substances will aggravate the damage to the stomach wall, and eventually make the stomach irreparable, causing gastric perforation - there is a big hole in the stomach, and gastric acid escapes from the hole and digests other organs - wow, that's too much Terrible!

Because I was wrapped in thick rice, it was not digested by my stomach. Soon, we arrived at the pancreas.

The function of the pancreas is to secrete trypsin and lysosomal enzymes into the duodenum. They are strong bases that neutralize our "stomach acidic foods" and become neutral foods. Don't think that the pancreas also has a "pancreatic mucosa". It doesn't have such a thing, so why won't the secreted substances dissolve the pancreas itself? No, because the relationship between them is not that of older brother and younger brother, but that of fire and dynamite! As long as there is no "collision" before reaching the duodenum, the "dynamite" cannot explode! Now you understand: if there is something wrong with the pancreatic duct (such as stones, viruses, etc.), trypsin and lysosomal enzymes will combine in the pancreas, causing "severe pancreatic pain". Okay, let's talk about the twelve refers to the intestine.

If the teeth are the first level to crush food, then the tongue is the second level to stir the food; if the stomach is the third level to accommodate and decompose food, then the pylorus is the third level to control the release of food. Four levels. The so-called fifth pass is the duodenum, which converts food into substances that can be directly absorbed by the small intestine. Of course, since I haven't been digested by my stomach, I can't switch.

Before talking about the small intestine, let me warn you: the duodenum is almost the most important part of the digestive system. Without it, you will starve to death even if you eat 10,000 cows! Therefore, we must protect the duodenum well.

The wall of the small intestine is filled with extremely fine fibers that absorb nutrients! I won’t say much more here. Finally, it enters the large intestine and is excreted from the body. It just so happened that he was defecating in the wild (of course we are not supposed to defecate anywhere, although it was not good for me), and I was brought to the fertile soil where I thrived.

I am going to tell my children about my experience. Maybe, like me, they will also visit the human body and even go to the blood world that I have never been to!

After I finished telling my story, I feel a little excited and want to go to the human body.

But I would like to remind you: it is not easy to be with smelly stools. If you want to go to the blood world, it is not easy to be dissolved by stomach acid and torn apart by the five horses in the small intestine!