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Digestive System Essay

527 words - 3 pages

Hello everyone! And once again, we are getting ready to go on a journey through the body. However, this time, we have been swallowed by a 55 year old male who has been eating a hamburger and French fries followed by a nice refreshing root beer. Everyone hold on tight! We are not exactly sure where this trip may land us at, but I am sure that it will be a fun filled adventure just like the last one!
We are where it all starts…the mouth. Here, the food is acted upon by saliva and enzymes like amylase. The digestion system is the part(s) of the body that takes in the nutrition and breaks it down so that it can be used by our body cells. Each of our body parts has a ...view middle of the document...

This is a common pipe for air and food. If you will notice, it divides into two sections: the food pipe and the trachea along with the epiglottis separated them so that the food does not enter into the windpipe (trachea). We are now traveling down a very muscular tube in the chest. This is known as the oesophagus. This is the food pipe. There are several muscular contractions that are known as peristalsis. They propel the bolus of the food forward. At the lower end of the sphincter, there is an esophageal sphincter that is acting as the gateway that allows the food to enter into the stomach and then squeezes it shut to keep the fluids and food from flowing back into the esophagus. Here, the stomach acts like a mixer grinder where the food is being churned and mixed with acids and enzymes like pepsin that are being converted into small digestible pieces. We are now leaving the stomach in this thick gravy like liquid. We are now entering the duodenum. This will not allow us to turn back once we are in here, so if you need to stop for anything, let me know now, because there is no turning back now. We are in the first part of the small intestine. The lining of the small intestine has a lot of finger like projections called villi. This is where the nutrients can be absorbed into the body. If you will notice, we are also close to the liver, gallbladder, and pancreas. These aren’t related directly to the digestion, but they are important in creating enzymes for the digestion of the food in the body.

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