Digestive System

Shaun LimKenneth KohDenton Tng Terrence Hoon

Definition of Digestion

What is digestion exactly? It is actually ... 1.the process of breaking down food

by mechanical and enzymatic action in the stomach and intestines into substances that can be used by the body.

2. A person's capacity to break down food in such a way.

What organs are in the digestive system

In chronological order… anus, appendix, esophagus, gall

bladder, large intestine, liver, mouth, pancreas, rectum, small intestine, and stomach

Food tract

The digestive tract is a long tube within the body that consists of organs that aid in the digestion of food. Most adults have a digestive tract that is about 30 feet (9.14 m) long. When a person eats, the food uses this tube to travel from the mouth to the esophagus. After reaching the esophagus, the food moves its way to the stomach. When it arrives at the stomach, enzymes continue to break down the food.

Food Tract (cont’d)

This food moves through the small intestine to the bowel where the food is completely digested and nutrients are absorbed. Any undigested food travels to the large intestine where water and salt is eliminated from it. This material is then transformed into a brown solid material that is stored in the rectum so it can be expelled as feces.

Food Tract(cont’d)

The digestive tract, which is the main component of the digestive system, is an important part of the body. This is because it converts food into a material that makes it easier for the body to use for nourishment. The digestive system breaks down food into the smallest particles so they can be absorbed into the blood stream.

Interesting Facts

We eat about 500kg of food per year. 1.7 liters of saliva is produced each day. 

The esophagus is approximately 25cm long. Muscles contract in waves to move the food down the esophagus. This means that food would get to a person's stomach, even if they were standing on their head. 

An adults stomach can hold approximately 1.5 liters of material. 

Our Sources

Wikipedia http://

www.wisegeek.com/what-is-the-digestive-tract.htm

http://library.thinkquest.org/J0112205/interesting_facts.htm

THANK YOU