Digestive System

Chemical digestion – hydrolysis reactions aided by enzymes (mainly in the stomach and small intestine) chemically break down food particles into nutrient molecules , small enough to be absorbed .

Mechanical digestion – muscular movement of the digestive tract (mainly in the oral cavity and stomach) physically break down food into smaller particles .

Elimination – undigested material will be released through the rectum and anus by defecation .

Absorption – passage of the end – products (nutrients) of chemical digestion from the digestive tract into blood or lymph for distribution to tissue cells .

Sequence Order

1.Oral Activity,2.Pharynx,3.Epiglottis,4.Stomach,5.Cardiac Sphincter,6.Pyloric Sphincter,7.Liver,8.Gall Bladder,9.Pancreas,10.Small Intestine,11.Large Intestine,12.Rectum,13.Anus

The oral cavity allows food to enter the digestive tract and have mastication (chewing) occurs , and the resulting food bolus is swallowed.

The pharynx receives the food after being swallowed.

The epiglottis is to prevent food and drink from falling down the airway.

The stomach is the storage of food.

The cardiac sphincter controls the passage from the esophagus into the stomach; sphincter muscles normally limit passage to one direction.

The pyloric sphincter controls the passage from the stomach into the duodenum.

The liver is to process and remove toxins from the blood.

The gallbladder is the storage of bile salts that the liver produces.

The pancreas breaks down protein, carbohydrates and fats with its own digestive juices.

The small intestines breaks down food using enzymes released by the pancreas and bile from the liver.

The large intestines is responsible for processing waste so that emptying the bowels is easy and convenient.

The rectum is to act as a temporary storage site for fecal matter before it is eliminated from the body through the anal canal.

The anus lets out the feces (waste) that has been in the rectum for a while.

Medical digestion is the physical process of breaking down food
Chemical digestion is the process of breaking down food by chemical enzyme.



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