The food friend eat bring away an tremendous journey with your body, from top (your mouth) come bottom (your anus). Along the way the valuable parts of her food are absorbed, giving you energy and also nutrients. This is a step-by-step account of the digestive system’s workings.
Structure that the digestive System

What is the digestive system?

Your digestive device is made up of the cradle (GI) tract and your liver, pancreas and also gallbladder. The GI street is a collection of hole organs the are linked to each other from your mouth to her anus. The offal that consist of your GI tract, in the order that they room connected, incorporate your mouth, esophagus, stomach, tiny intestine, huge intestine and also anus.

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What go the digestive mechanism do?

Your digestive system is uniquely built to carry out its task of transforming your food right into the nutrients and also energy you should survive. And when the done v that, that handily packages your solid waste, or stool, because that disposal as soon as you have actually a bowel movement.

Why is digestion important?

Digestion is important due to the fact that your body needs nutrients native the food friend eat and the liquids friend drink in order come stay healthy and function properly. Nutrients include carbohydrates, proteins, fats, vitamins, minerals and water. Your digestive system breaks down and also absorbs nutrient from the food and also liquids you consume to usage for essential things choose energy, growth and also repairing cells.

What organs consist of the cradle system?

The key organs that make up the digestive system (in order of their function) are the mouth, esophagus, stomach, small intestine, big intestine, rectum and anus. Help them along the means are the pancreas, bile bladder and also liver.

Here’s exactly how these organs work together in your digestive system.



The mouth is the beginning of the digestive tract. In fact, cradle starts before you also take a bite. Your salivary glands get energetic as friend see and smell the pasta food or heat bread. ~ you begin eating, friend chew her food into pieces that are much more easily digested. Your saliva mixes through the food to begin to rest it down into a form your body deserve to absorb and use. Once you swallow, your tongue overcome the food into your throat and into her esophagus.


Located in your throat near your trachea (windpipe), the stomach receives food from her mouth as soon as you swallow. The epiglottis is a little flap the folds over her windpipe together you gulp down to prevent you indigenous choking (when food goes into your windpipe). A series of muscular contractions in ~ the esophagus dubbed peristalsis it is provided food to your stomach.

But very first a ring-like muscle at the bottom of her esophagus referred to as the lower esophageal sphincter has to relax come let the food in. The sphincter climate contracts and prevents the components of the stomach indigenous flowing earlier into the esophagus. (When it doesn’t and these materials flow ago into the esophagus, you might experience acid reflux or heartburn.)


The stomach is a hole organ, or "container," that holds food while that is being combined with stomach enzymes. These enzymes proceed the procedure of breaking down food into a usable form. Cell in the lining of her stomach secrete a solid acid and powerful enzymes that space responsible because that the breakdown process. As soon as the materials of the stomach space processed enough, lock released into the tiny intestine.

Small intestine

Made up of three segments — the duodenum, jejunum, and ileum — the little intestine is a 22-foot lengthy muscular tube the breaks under food using enzymes exit by the pancreas and bile indigenous the liver. Peristalsis additionally works in this organ, moving food through and also mixing it v digestive juices indigenous the pancreas and liver.

The duodenum is the very first segment the the small intestine. It’s greatly responsible for the consistent breaking-down process. The jejunum and also ileum reduced in the intestine are largely responsible for the absorb of nutrients right into the bloodstream.

Contents that the tiny intestine start out semi-solid and end in a liquid type after passing through the organ. Water, bile, enzymes and also mucus contribute to the readjust in consistency. When the nutrients have actually been absorbed and the leftover-food residue liquid has passed through the tiny intestine, it then moves on come the huge intestine, or colon.


The kidnize secretes digestive enzymes right into the duodenum that failure protein, fats and also carbohydrates. The pancreas additionally makes insulin, happen it straight into the bloodstream. Insulin is the cook hormone in her body because that metabolizing sugar.


The liver has numerous functions, yet its main job within the digestive system is to process the nutrients absorbed from the small intestine. Bile native the liver secreted right into the little intestine additionally plays an important role in digesting fat and some vitamins.

The liver is your body's chemical "factory." that takes the raw materials took in by the intestine and also makes every the assorted chemicals her body requirements to function.

The liver likewise detoxifies potentially harmful chemicals. It breaks down and also secretes many drugs that deserve to be toxic to your body.


The gallbladder stores and concentrates bile native the liver, and then publication it right into the duodenum in the tiny intestine to aid absorb and digest fats.

Colon (Large Intestine)

The big intestine, or colon, is responsible for handling waste so the emptying the bowels is easy and also convenient. It’s a 6-foot long muscular tube that connects the small intestine come the rectum.

The huge intestine is made up of the cecum, the ascending (right) colon, the transverse (across) colon, the descending (left) colon, and also the sigmoid colon, i m sorry connects come the rectum.

Stool, or rubbish left end from the digestive process, is passed with the colon by way of peristalsis, very first in a liquid state and ultimately in a hard form. As stool passes through the colon, water is removed. Stool is save on computer in the sigmoid (S-shaped) colon until a "mass movement" empties it into the rectum when or double a day.

It normally takes around 36 hrs for stool to gain through the colon. The stool itself is greatly food debris and also bacteria. These “good” bacteria execute several advantageous functions, such together synthesizing assorted vitamins, handling waste products and food particles and also protecting versus harmful bacteria. When the diminish colon becomes complete of stool, or feces, the empties its contents into the rectum to begin the procedure of removed (a bowel movement).


The rectum is a straight, 8-inch chamber the connects the colon come the anus. The rectum's job is to get stool indigenous the colon, permit you understand that there is stool to it is in evacuated (pooped out) and to hold the stool until evacuation happens. Once anything (gas or stool) comes into the rectum, sensors send a article to the brain. The mind then decides if the rectal components can be exit or not.

If castle can, the sphincters relax and also the rectum contracts, disposing its contents. If the contents cannot be disposed, the sphincter contracts and the rectum accommodates so that the sensation temporarily goes away.


The anus is the last component of the digestive tract. That is a 2-inch lengthy canal consist of of the pelvic floor muscles and the two anal sphincters (internal and external). The lining that the upper anus is able come detect rectal contents. It lets you understand whether the materials are liquid, gas or solid.

The anus is surrounding by sphincter muscles the are essential in enabling control that stool. The pelvic floor muscle creates an angle between the rectum and the anus that stops stool from coming out once it’s not supposed to. The interior sphincter is always tight, other than when stool beginning the rectum. This keeps united state continent (prevents united state from pooping involuntarily) when we space asleep or otherwise unaware of the presence of stool.

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When we obtain an urge to walk to the bathroom, we rely on our external sphincter to organize the stool until reaching a toilet, where it climate relaxes to release the contents.