Do the small intestine, stomach, large intestine, mouth, anus and esophagus all belong to the digestive system?

The reason why we eat some food is to solve the problem of hunger, and the more important purpose is to provide enough nutrition for the body. The premise is that the food you eat is thoroughly digested and absorbed, because without nutrition, the body may have problems and become ill. From a medical point of view, if you want your body to absorb more nutrients, you naturally need the help of the digestive system. So, do the small intestine, stomach, large intestine, mouth, anus and esophagus all belong to the digestive system?

The digestive system consists of two major parts: the digestive tract and the digestive glands. Digestive tract: includes the mouth, pharynx, esophagus, stomach, small intestine (duodenum, jejunum, ileum) and large intestine (cecum, appendix, colon, rectum, anus) and other parts. Clinically, the section from the mouth to the duodenum is often called the upper digestive tract, and the section below the jejunum is called the lower digestive tract. There are two types of digestive glands: small digestive glands and large digestive glands. Small digestive glands are scattered in the walls of various parts of the digestive tract, and large digestive glands include three pairs of salivary glands (parotid glands, submandibular glands, and sublingual glands), liver and pancreas. The digestive system is one of the nine major systems of the human body.

The digestive system consists of two parts: the digestive tract and the digestive glands.

The digestive tract is a long muscular tube that starts from the mouth and continues through the pharynx, esophagus, stomach, small intestine, large intestine, and to the anus. It passes through organs including the mouth, pharynx, esophagus, stomach, small intestine (duodenum, jejunum, ileum) and large intestine (cecum, colon, rectum).

There are two types of digestive glands: small digestive glands and large digestive glands. Small digestive glands are scattered in the walls of various parts of the digestive tract. Large digestive glands include three pairs of salivary glands (parotid glands, submandibular glands, and sublingual glands), the liver, and pancreas. They all use ducts to discharge secretions into the digestive tract.

There are five digestive glands in the human body, namely: salivary glands (secreting saliva, salivary amylase breaks down starch into maltose), gastric glands (secreting gastric juice, breaking down protein into polypeptides), liver (secreting bile, stored in the gallbladder, breaking down large molecules of fat into small molecules of fat, called physical digestion, also known as "emulsification"), pancreas (secreting pancreatic juice, pancreatic juice is a digestive juice that has a digestive effect on carbohydrates, fats, and proteins), intestinal glands (secreting intestinal juice, breaking down maltose into glucose, polypeptides into amino acids, and small molecules of fat into glycerol and fatty acids, which is also a digestive juice that has a digestive effect on carbohydrates, fats, and proteins).