Human Body Functions
The Function of the Digestive System
The Importance of the Stomach
Without the Stomach
If the stomach was removed, you would experience many different problems in different areas of your body. If you removed an organ such as your Tibia or Fibula, you could just replace it with a prosthetic leg. You could survive simply without them, rather than
without a stomach.
The Interdepence with Other Body Systems
Without the digestive system, many other systems would not be able to function properly. In the small intestine, nutrients are absorbed into the blood stream. If there was no stomach, there would be no nutrients in the blood stream and then the Circulatory system would not be able to do its function, circulate the blood around to other systems. Then for example, the Muscular system would not get the nutrients it need.
Organs in the Digestive System
In the digestive system, there are three major organs; the stomach, small intestine, and the large intestine. For carbohydrates digestion starts in the mouth but for proteins it starts in the stomach. After the food is swallowed it is pushed through the esophagus through peristalsis into the stomach. In the stomach food is mixed with digestive juices (enzymes). It is then pushed into the small intestine, again, through peristalsis. In the small intestine nutrients are absorbed in the blood stream and proteins are torn into pieces. Then the remains are squeezed into the large intestine through peristalsis. In the large intestine water is squeezed out of the waste product and that is pushed into the excretory/urinary system.
Facts About the Digestive System
~ Over 90% of digestion and absorption takes place in the small intestine
~ It takes food seven seconds to get from your mouth to your stomach
~ An adult esophagus ranges from 10-14 inches in length and one inch in diameter
~ It takes your mouth, esophagus, stomach, small/large intestines, gall bladder, pancreas, and liver just to digest a glass of milk.
~Your digestive tract is some 9 meters in length
Facts About the Stomach
~ The stomach must produce a new layer of mucus every two weeks, or it will digest itself
~ An adult stomach can hold about one liter of food
~ The stomach can expand to hold four times its normal volume
~ The acid in your stomach is strong enough to dissolve razor blades
~ Food stays in your stomach for two to three hours