Essay Archive - The Digestive Track
The Digestive Track
The BIG MAC is placed in the mouth. The bread is mainly starch, the special
sauce is mainly fat, lettuce, pickles, and onions are niacin. The beef patties
are protein,and cheeseis a form of calcium, fat, and protein.
The piece of the BIG MAC is placed in the mouth and chewed, the starch is
being digested by saliva. The starch becomes a kind of sugar which is used as a
nourishment for the cells. Saliva changes food to a form that can be used by
the body called enzymes. The burger is swallowed and passes into the esophagus.
This is the muscular tube that contracts along its length to push the food down....
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