/ / Human digestive system: structure and functions (photo)

Human digestive system: structure and function (photo)

The most important part of the body ishuman digestive system, the structure and functions of which are considered to be a very interesting topic. In fact, it is very important to know exactly how certain processes occur in our body. Digestion is no exception. This is the most important process. And about how it happens, you should tell in more detail.

human digestive system structure and function


For a start it is worth giving a definition to the phrase“Human digestive system”. The structure and functions will be discussed later. This is a set of digestive organs. All of them provide the body with various vitamins, substances (in other words, “building material”) and energy. All this is vital for the full existence of man. Due to this, tissues and cells are restored and renewed. This process occurs constantly, since all of the above in the process of life is destroyed.

Digestion itself is a process induring which chemical and mechanical processing of food takes place. All substances entering the body are broken down into their components, some of which pass through the walls of the alimentary canal, and everything else is recycled.

human digestive system function

Digestive canal

This is a very special part of the organs.The total length of this channel is approximately 8-10 meters! This part of the organs includes the human digestive system. The structure and function of the channel is also special.

Its first component is the oral cavity.Everyone knows what it is. The cavity consists of the salivary glands, tongue and teeth. It is there that food is crushed. Also, due to language receptors, a person feels the taste and temperature of food or drink consumed. Thanks to the tongue and saliva, so-called food lumps are formed, which then go down the throat. This, in turn, is a funnel-shaped organ, which is the connecting element between the esophagus and the oral cavity. The pharynx contributes to pushing through food, but it happens at the reflex level.

The esophagus also includes digestivesystem. Its structure and functions are very specific. The esophagus is a long 25-centimeter tube, the upper part of which consists of striated muscle tissue. The bottom is from smooth. And most importantly, the esophagus is the place through which processed food enters the stomach.

human digestive system structure and functions of the photo

Splitting food

These are the most important components that havehuman digestive system. Their functions are appropriate. The stomach is an extended part of the canal. It contains glands that produce gastric juice. It contribute to the rapid breakdown of food. This is the main function of the stomach - to digest food. But this is not all organs, which includes the human digestive system.

The functions of splitting food helps to perform alsoliver. And the pancreas. It is the liver that produces bile, which contributes to the digestion of food. And the pancreas secretes special enzymes that also “help” bile. They contribute to the breakdown of carbohydrates, fats and proteins.

The last stage of the digestive process

Finally, the intestines.Without it, the human digestive system cannot exist. The structure and functions (photos are presented in the article) of the intestine are also special. Firstly, its length is about 4 meters. Secondly, the ducts of the gallbladder open in the intestine (more precisely, in the duodenum 12). It should be remembered that there is a small and large intestine. The first of these is the longest component of the digestive system. The small intestine has villi, and it is through them that the nutrients are absorbed. Fat produces a special mucus. Thanks to her fiber breaks down.

The intestine ends with the rectum. It ends with an anus. It is through him that undigested food remains are removed from the body.

human digestive system structure and functions splanchnology

About functions

Очень много важных процессов выполняет human digestive system. The structure and functions of splanchnology for all the time of its existence has already managed to study in some detail. This science, more precisely, the scientists specialized in this field have already managed to give not only a detailed definition of this system, but also to formulate special terms. Separately, it is worth noting how it was decided to call the function of the digestive system.

Итак, всего их три. Первая – моторно-механическая.As you can guess, it means grinding, as well as the subsequent movement of food. The second function is secretory. All organs that make up the system, produce enzymes, juices and bile - all this improves and speeds up the process of food processing. And finally, the third - suction. Food, passing through the digestive system, is broken down, and the useful elements that it contains (minerals, vitamins, proteins, etc.) penetrate into the blood.


На этой теме внимание следует заострить.The human digestive system (functions, structure were discussed above) is a very complex and multifaceted part of our body. Earlier it was casually mentioned that it contains enzymes that affect the splitting of food. Now let's talk about these substances in more detail and list them all.

Amylase breaks down glycogen and starch, of whichmaltose is formed. It, in turn, is processed by maltase. And in the end get two glucose molecules. The listed enzymes are salivary.

human digestive system function structure

The formation of vital enzymes

Pepsin and chymosin are found in the stomach.Cleave proteins, after which peptides are formed. In the pancreas contains trypsin, processing these same peptides. As a result, amino acids are obtained. Amylase and lipase break down fats and starch.

In the gallbladder and liver contains salt, forby which digestive enzymes are activated, and fats are emulsified. Finally, a few words should be said about the enzymes of the small intestine. There are many of them: maltase, lactase, phosphatase, sucrase ... They break down a lot of different substances, resulting in the formation of vital elements for the body. These are glucose, fructose and free phosphate.

human digestive system anatomy

Health issue

This is the last topic to be touched,telling about what constitutes the human digestive system. Anatomy is a science that has studied in detail the human body and its specificity. And scientists who are professionals in this field advise all people to look after their health. The digestive system also needs care, as it works constantly.

It is advisable to stop smoking. Thousands of chemical toxins enter the body, cheb irritate the stomach. In this regard, gastritis, heartburn and ulcer can develop.

It is also very important not to be nervous.When a person is under stress, the gastrointestinal tract begins to work more slowly. As a result, appetite disappears, and vital substances and vitamins cease to enter the body.

Alcohol - even comments are not needed here.The liver, pancreas, kidneys - all this is destroyed. And slows down the metabolism. The same thing comes from fast food. This is a very junk food, which inexorably destroys our gastrointestinal tract.

Sedentary, too fasteating food, swallowing whole pieces, harmful foods that do not contain vitamins and fiber, too fatty, salty, spicy, hot or too cold food - all this also negatively affects the digestive system. And if you really can’t follow her as you need, then you should at least bring healthy foods into your diet. Fruits, dairy products, mineral water, vegetables - all this will help to improve the intestinal microflora and metabolic process. And of course, it is important that all products and utensils are clean. Hygiene above all.