DIGESTIVE SYSTEM

MAIN FUNCTIONS

The digestive system has three main functions

• Digestion: break down of foods in to simpler forms which can be absorbed by the body cells 
• Absortion: nutrients form digested food absorbed in to the blood stream 
• Elimination: forming, storing and elimination of solid wastes 

PARTS

The main parts are:

• Mouth: mastication or chewing is the first step digestion. Chewing increases the surface area of foods to allow more efficent break down .
• Esophagus: connect the mouth to the stomach 
• Stomach: the acids in the stomach break down the long chains of food (as proteins)
• Liver the liver is an organ that remove the toxic subtances from the body. 
• Small intestine: It is where most of the absorption of food takes place.
• Large intestine : It is where the water is absorbed and the feces are before being removed.
• Anus: Its function is to contro the feces removal

RELATIONSHIP WITH OTHER SYSTEMS 

• Circulatory system : Provides the nutrients to the blood used in the body processes.
• Excretory system: The excretory system helps the digestive to getting rid of waste subtances.

ILLNESSES THAT CAN AFFECT TO THE DIGESTIVE SYSTEM

• Gastritis: It is caused by bacterial infection. Gastritis can cause vomiting, diarrhea and abdominal pain.
• Reflux: It is the abnormal flux of the stomach contents (including acids) to the esophagus

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