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A cheeseburger consists of bread, meat and cheese.

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Introduction

A cheeseburger consists of bread, meat and cheese. The bread contains carbohydrates which gives us energy. The meat contains protein which helps to build up the body and the cheese contains fats and oils, lipids, which also give us energy, and the fats in addition keep us warm and oils on the surface help to keep the body waterproof. There is also water and salt in the cheeseburger. The salts help to make tissues and organs in the body work properly and water provides a fluid in which other substances can move around the body and react together within the cells. Here are all of the stages in which a cheeseburger needs to go through to be digested. To begin with, the digesting of the cheeseburger starts in the mouth. Here, physical digestion takes place as the food is broken into smaller pieces by the grinding and chewing of the teeth. ...read more.

Middle

The only chemical digestion that takes place in the stomach is the breakdown of proteins, which is from the meat in the cheeseburger, to polypeptides. This is done by the enzyme pepsin which comes from the stomach. Hydrochloric acid is also produced by the walls of the stomach, making the pH of the stomach contents very acidic at about 2 pH. This low pH helps the pepsin to digest proteins. The acidity in the stomach also helps to kill any bacteria on the food. The food then travels through the small intestine, a very long tube of several metres, in which food is moves by peristalsis. It is divided into two parts. In the 1st part, called the duodenum, the process of digestion is completed. The secretions from two other organs are also poured onto food in the duodenum: The first organ is the pancreas, which produces pancreatic juice. ...read more.

Conclusion

They are: Glucose, which is the product when maltase acts upon maltose, which came from the bread of the cheeseburger, which contains carbohydrates. Amino acids, which is the product when protease acts upon polypeptides, which came from the meat of the burger, which contains proteins. Fatty acids and glycerol, which are the products when lipids, are acted on by lipase, which came from the cheese of the burger, which contains fats. After all of the cheese burger has been digested there is a final stage in which these end products, glucose, glycerol, fatty acids and amino acids are absorbed into the body. The Ileum, the second part of the small intestine does this. After the dissolved food molecules have been absorbed by the ileum, the food passes into the colon or large intestine. All that happens here is that water is reabsorbed and then it is stored in the rectum and is past out of the body at will. ...read more.

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