How the Digestive System Works

Digestive System.
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What Is the Digestive System?

The human digestive system is a series of organs which transform food into essential nutrients that are absorbed into the body and remove waste. the digestive system is the organ group that breaks down healthy food to  absorb its nutrients, the body uses the nutrients in food as fuel to keep all  body systems functioning.

The remaining parts of food that can not be  broken down, digested or absorbed are excreted as movements of the intestine (stool), the body system concerned the ingestion, digestion and absorption of food and residual waste discharge consisting of the digestive tract and accessory glands(such as salivary glands and pancreas).

Which secrete digestive enzymes, your digestive system is specifically designed to transform the food you eat into nutrients that the body uses to repair energy, growth and cells.

Why is digestion important?

Digestion is important because your body needs food and drink nutrients  to function properly and stay healthy.

Nutrients include protein, fats,  carbohydrates, vitamins, minerals, and water, your digestive system breaks  nutrients into small enough parts to absorb and use your body to repair  energy, growth, and cells.

  • Proteins disintegrate into amino acids.
  • Fats break into glycerol and fatty acids.
  • Carbohydrates break into sugars that are simple.

Function of the Digestive System.

Your digestive system is designed to fulfill its specialized function of  transforming food into the energy you need to survive and packaging  the waste for disposal, here is an overview of the structure and function  of this complex system to help you understand how the many parts of the  digestive system work together.

The following organs work together to help your body process the foods you eat:

  • The Mouth.
  • Esophagus.
  • Stomach.
  • Small intestine.
  • Pancreas.
  • Liver.
  • Gallbladder.
Digestive System.


The mouth is the beginning of the digestive tract, indeed, when you take  the first bite of food, digestion begins here, chewing breaks the food into  pieces that are easier to digest, while saliva mixes with food to start  breaking it down into a form that can be absorbed and used by your body.


Upon swallowing, the esophagus is located in your throat near your  trachea (windpipe), the esophagus delivers food to your stomach through  a series of muscular contractions called peristalsis.


Glands in your stomach lining make food breaking down stomach acid  and enzymes, your stomach muscles mix the food with the digestive juices.

Small intestine:

Your small intestine produces digestive juice that mixes bile and  pancreatic juice to complete protein, carbohydrate, and fat breakdown, some of the enzymes you need to digest carbohydrates are made by  bacteria in your small intestine.

The small intestine is a 22-foot long muscle tube that breaks down food  using enzymes released from the liver by the pancreas and bile, it consists of three segments – duodenum, jejunum, and ileum.

The small intestine begins semi – solid and ends in a liquid shape after passing through the organ. water, bile, enzymes, and mucous substances  contribute to the consistency change, after absorbing the nutrients and  passing the leftover – food residue liquid through the small intestine,  it moves on to the large intestine or colon.


In the duodenum, the first segment of the small intestine, the pancreas  secretes digestive enzymes, protein, fats and carbohydrates are broken  down by these enzymes.

Another necessary organ related to digestion is the pancreas, by secreting  pancreatic juice, a liquid filled with enzymes and sodium bicarbonate, your pancreas helps your small intestine, this can stop the pepsin digestion  process, it also secretes insulin that helps regulate your blood sugar in your body.


Your liver produces a digestive juice called bile, which helps digest fats  and certain vitamins. Bile ducts carry bile from your liver for storage to your gallbladder or for use in the small intestine.

There are many functions in your liver. First, it produces bile, which is  used by the small intestine to help digest the food fats, proteins, carbohydrates, and fats are also metabolized, helps regulate blood sugar levels, stores  glycogen for fast energy, produces fibrinogen that coagulates blood,  produces vitamin A ; and recycles worn-out red blood cells.


The bile between meals is stored in your gallbladder, your gallbladder  squeezes bile into your small intestine through the bile ducts when you eat.

your gallbladder tucked under the liver is a bile storage container, a  yellow-green fluid consisting of salts, cholesterol, and lecithin.  your small bowel uses bile produced by the gallbladder to digest fats.

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