Digestive

=**__The Digestive System__**=


 * __Physiology__**

The digestive system provides organic molecules for two purposes; 1) provide energy to the body, 2) give the body raw materials to increase its size or repair itself.

Food enters the **mouth** where it is crushed and mashed with the **tongue** and **teeth.** Then food is swallowed down the **esophagus** and it moves into the **stomach**, where food is broken down using chemicals. This mixture moves into the **small intestine** where some more breaking down occurs (bile from the **liver** stored in the **gall bladder** breaks down lipids, the **pancreas** releases enzymes that break down proteins and starches, a carbohydrate). As the food moves through the **small intestine** it is broken down completely and begins to get absorbed through passive and active transport into the blood. The **liver** receives much of this blood and helps detoxify some dangerous chemicals that may be in it (alcohol, for example). The remaining, undigested food and all the water move into the **large intestine**. The **large intestine** is where water is absorbed and the undigested food is stored as feces until it is expelled from the anus.
 * __Anatomy__**

A clip showing the above.