Digestive System

21/07/2014 18:35:00

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INTRODUCTION
The food we eat contains a variety of nutrients, which are used for building new body tissues and repairing damaged tissue. Food is also vital for life because it is our only source of chemical energy. As consumed however, most food cannot be used either to build tissues or to power the energy requiring chemical reaction of body calls. Rather, food must be broken down into molecule that are small enough to enter body cells, a process known as Digestion.
The passage of these smaller molecules through the plasma membranes of cells lining the stomach and Intestines and then into the blood and lymph is termed absorption.
The organs that collectively perform there function are collectively make a system known as Digestive System.

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