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Diagram of the Digestive Tract

Batul Nafisa Baxamusa Oct 9, 2018
We will cover the digestive tract diagram, along with some information on human digestive system.
You tend to eat and drink all day, pizzas, burgers, salads, fruits, juices, colas, water, broccoli, milk, etc. but have you ever wondered the path the food follows, once it enters your mouth till it reaches the stomach? The food enters the digestive tract that begins with mouth and ends in the anus. This long path of the digestive tract involves many organs.

Organs of the Human Digestive Tract


The mouth is the first organ of the digestive tract. Mouth has several appendages that help digestion. The tongue tastes food and pushes it down the food pipe and teeth help chew and grind the food particles into smaller digestible pieces.

Salivary Glands

The salivary glands contain many enzymes that begin breaking the chemical in foods in the mouth. In other words, the process of digestion begins in your mouth!


The long muscular tube that carries the food from the mouth to the stomach. The esophagus is 10 inches in length and carries the pulpy mass of partially digested food to the stomach.


The stomach is like a food processor and storehouse for the food to be digested. The stomach looks like a deflated balloon in the diagram of digestive tract . It is just a foot long and six inches wide. It secretes hydrochloric acid, that helps in digesting food.
The stomach also contains other enzymes, digestive juices and acids. They help in breaking down complex proteins, fats and carbohydrates into more simple and easily absorbed molecules.

Human Digestive Tract Diagram

Small Intestine

Although called the small intestine, it is the longest organ of the digestive tract, as you can see in the diagram of digestive tract. It is divided into three sections. The first section is called the duodenum, where the food is completely digested and the acidity of chyme is totally negated.
The different foods molecules, like carbohydrates are broken down into simple sugars, proteins into amino acids, fats to fatty acids.
The second section is the jejunum, that has many villi, that is, hair-like microscopic structures. They absorb the amino acids, fatty acids, glycerols and sugars from the duodenum and direct them to the other parts of the body.
The last section of the small intestine is the ilium, that has around five to six million villi. These vili are constantly moving, oscillating, pulsating, etc. and take up every little available nutrient.

Large Intestine

The large intestine is the organ where the excretory products are formed as you can see in the earlier diagram. The water from the body is absorbed by the large intestine and the waste is extracted that is compressed into firm stools.
The brain is sent signals by the nerve cells of the large intestine, when it needs to move bowels. The feces are pushed down the rectum and out of the body through the anus.
This is a short explanation on the diagram of the human digestive tract. The digestive tract plays a very important function in our body without which we cannot survive. The digestive system helps give our body the nutrient supplements that help in our very existence.
Not only this, it also helps in removing the toxic wastes of the body, which may lead to poisoning and death. You can use the above digestive tract diagram and explain your kids the process of digestion taking place in their bodies.