The Digestive System

             The increasingly disgusting human body must receive its energy chemically. The only way is through its digestive system. There, chemical energy can be absorbed and used for the growth of cells. The original form of this chemical energy is just plain food. The digestive tract is designed to break this food down into useful chemical energy. This digestive tract is considerably one long tube leading from the mouth to the anus. If an object is inside this gastrointestinal (GI) tract, it technically isn't on the inside of the body since it just may be passed through. However, even though this "GI" tract isn't technically the inside the body, it is very complicated with a myriad of functions and organs from beginning to end.
             Firstly, for a person to turn food into energy, he/she must start eating it. One must take it into his/her oral cavity or mouth and start to masticate or chew. This is actually where the digestion process begins. The mouth is breaking down the food into several smaller pieces so it can be easier to absorb. If one studies the design of the mouth, he/she will understand that it was especially designed for the braking down of food. The top of the mouth contains a hard palate which is a perfect place for the smashing of food. Anterior to the hard palate is the soft palate consisting of mostly muscle. The teeth surrounding the mouth can both chop up and grind up food. Moreover, the main worker within the mouth, the tongue, moves around the food within the mouth. It consists of skeletal muscle which is connected to the skull and the hyoid bone. The muscle is kept in place by the frenulum which is inferior to the tongue at the bottom of the mouth. On the superior side of the tongue, there are special nerves that gives the food we eat a taste. They are called vallate papillae or taste buds. This equipment in the mouth allows for the physical breakup of food. However, more is happening inside the mouth during mastication than it might appear to the naked eye.