What is the route of food in the human body?

The route of food in human body is: food-mouth-esophagus-appetite-stomach-stomach pylorus-duodenum-jejunum-ileum-cecum-ascending colon-transverse colon-descending colon -S-shaped colon-rectum-terminal anal canal-anus.

Food is chewed into fine particles in the mouth, and after swallowing, the food particles enter the stomach through the esophagus. After the food is concentrated, the stomach keeps crawling and secretes gastric juice to help mix and stir these small particles for digestion and absorption. Then the food is sent to the small intestine, just like on a winding conveyor belt. Wherever the conveyor belt goes, it can absorb nutrients in food.

Nutrition is mixed in the blood and then transported to all parts of the body. After food is absorbed by intestinal villi on the conveyor belt, what remains is some useless residue. These residues are sent to the large intestine, which will absorb the water in the residues. Finally, these residues will be excreted through the anus, that is, feces. In this way, food has completed its journey in the human body.

Extended data

Basic functions of digestive system:

The basic physiological function of the digestive system is to ingest, transport, digest food, absorb nutrients and excrete waste. The completion of these physiology is beneficial to the coordinated physiological activities of the whole gastrointestinal tract.

The digestion and absorption of food provide the substance and energy needed by the body. In addition to vitamins, water and inorganic salts, nutrients in food can be directly absorbed and utilized, while protein, fat and sugar can not be directly absorbed and utilized by human body, but can only be decomposed into small molecular substances with simple structure in digestive tube for absorption and utilization.

The process that food is broken down into small molecules with simple structure and can be absorbed in the digestive tract is called digestion. The process of this small molecular substance entering the blood and lymph through the epithelial cells of the digestive tract is absorption.

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