What is the importance of the digestive system: important answers

In everyday life, a person rarely pays attention to the digestive system, ignoring not only the signals of his body, but also the arguments of reason, without trying to figure out what the digestive system is for good health. Insufficient or excessive amount of food, as well as its composition - all this affects one of the most important systems in the human body.

Digestion starts in the mouth

Trying to explain what the meaning is, it is worth pointing out right away that the digestive process begins as soon as a piece of cake or Brussels sprouts enters a person's mouth. A large number of glands that secrete saliva are located in the oral cavity. It is saliva that protects the enamel of the teeth, ensuring the constancy of its composition. In addition, by washing the entire cavity, saliva provides disinfection, being a natural, although not strong, antibiotic. The salivary glands produce a small amount of calcium, which nourishes tooth enamel.

Here it is worth saying that saliva is produced only in the daytime, which means that bacteria have every chance to increase their population at night. That is why brushing your teeth is so important - evening and morning.

Esophagus and intestinal tube

The chewed food, the fermentation and digestion of which has already begun in the oral cavity, after swallowing, enters the esophagus. The diameter of this tube is normally about 2 centimeters.

From the esophagus, the food bolus enters the stomach, which has a bizarre bag shape with oblique sutures. It is located diagonally from left to right, while the left side is much higher than the right.

Immediately after the stomach begins the small intestine, located in disorder in the abdominal cavity. The length of this organ reaches seven meters. It is in the small intestine that the most important thing happens - the assimilation of all the useful elements that a person absorbs. In addition to its amazing length, it also has a huge area. After all, every millimeter of the intestine is covered with thin villi, in which metabolism occurs. If all these villi straightened, then the intestines would increase in length by two and a half times. It is from the intestines that nutrients enter the bloodstream, because each villus contains a blood vessel. This brings us closer to understanding what the significance of the digestive system is.

Biology: Grade 6

The upper intestines are sterile, while the stomach and lower large intestine are rich in various types of bacteria that aid digestion. Modern science knows for sure that most of the immune system is concentrated in the stomach and the state of the microflora most directly affects human health.

Perhaps even a schoolboy should know the answer to the question that we are considering in this article. Namely: "What is the significance of the digestive system?" (6th grade). A sixth grader should have an understanding of its structure, as well as the fact that this system is full of nerve endings, glands that secrete enzymes and hormones, each of which is important for health.