Importance of the digestive system of the human body

It is a very important system of the human body, since our body needs energy to do the job and this energy can be obtained through the food we eat and the liquids we drink. When we eat or drink, this food enters our digestive system, so the digestive system absorbs all the nutrients, minerals, vitamins, irons, carbohydrates and calcium from this food. After absorbing it, it supplies these nutrients to our body or bloodstream. In this way, the human body obtains energy for all its activities with the help of the digestive system. Digestive systems also expel all waste from the human body, which is also very important.


The digestive system of the human body starts from our mouth and ends in the anus. In the way all parts of the digestive tract break down food and lower it from the system. After absorbing all the nutrients along the way, the waste is excreted by the human body. The whole digestion process is controlled by the nerves and hormones of the human body. Components and their function in the digestive tract.

Mouth and oral parts

The first part of the digestive tract is the mouth. Food begins to digest when it enters the mouth. First of all, food is crushed by a mechanical process through our teeth.

Salivary glands and Sliva

There are about 1000 salivary glands present in our mouth. As soon as our tongue tastes food, the sensors activate the salivary glands to secrete saliva which calms the food in a bolus. Subsequently, the food moves down the digestive tract through our tongue. Food moves lower when swallowing. here
The epiglottis is present, which helps food to move easily down and prevent suffocation. After this food reaches the esophagus.


After starting to swallow, the esophagus receives the signal from the brain and begins peristalsis and, through peristalsis, food moves to the stomach.


When food or liquid enters the stomach, it is mixed with digestive chemicals or enzymes. Digestive juices added with food with the help of the stomach muscles. With these muscles, food becomes chime or a thick liquid which is then transferred to the small intestine.


The pancreas is an organ that produces enzymes that break down food into fragments of vitamins, minerals, carbohydrates and iron in the small intestine. These enzymes reach the small intestine through small tubes known as ducts.

Liver and Gallbladder

The liver produces bile, which is a key juice for digesting certain vitamins. This bile is stored in the gallbladder. Bile is squeezed from the liver and gallbladder into the small intestine of the human body through the bile ducts.

Small intestine

When food reaches the small intestine, digestive juice is added to the food with pancreas juice, as well as liver bile and gallbladder. These juices divide the food into nutrients, fats and carbohydrates. The muscles of the small intestine absorb these nutrients along with water and therefore these minerals and vitamins are added to the bloodstream or where they are required. After all required
Nutrients are absorbed and food waste is transferred from the small intestine to the large intestine.

Large intestine

More water and nutrients left from food are absorbed when it reaches the large intestine. Parts of undigested foods, unnecessary products during food digestion and large parts of foods that cannot be digested become waste of the digestion process. Subsequently, the large intestine absorbs more water from this waste, which converts this waste into feces or feces. These feces are stored in the rectum, an organ under the large intestine and then excreted.

Nerves and hormones

The nerves and hormones of the human body control the entire digestion process. The nerves are connected to the brain and tell the brain when to release the digestive juice or how much to release. They also control the expansion and contraction of the muscles that cause food to move downward in the digestive system. Hormones control the human body by allowing digestive juices at the right time and also tell the brain that it needs food or not. The stomach, pancreas and small intestine release hormones that are very necessary for the human digestive system.


I'm Mr. Umar Shahzad Bachelors in Business Administration from National Textile University Faisalabad. It's my passion to work on I'm also Worked As A Quality Auditor & Currently I am Working Assistant Marketing Manager.

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