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The digestion of a Bic Mac.
Transcript of The digestion of a Bic Mac.
The mouth is where the digestion process starts. When food is ingested, it is ground by the teeth. Then, with the help of the tongue, is moved toward the esophagus.
The next step in the digestive process is the transport of food from the mouth to the stomach. The esophagus us a hollow muscular tube that is used only for transport through a series of muscular contractions.
After the food passes through the esophagus, it enters the stomach. Here, the food mixes with strong stomach acids and enzymes such as pepsin to begin breaking down the food.
The Small Intestine
After the food is broken down by the stomach, it moves to the small intestine. The small intestine is where most of the nutrients are absorbed.
The Large Intestine
The role of the large intestine is to prepare the undigested food for elimination through the anus. In the large intestine, excess water is returned to the blood and bacteria work to neutralize the harmful byproducts.
The digestion of proteins like those found in the beef patty of a Big Mac, take place in the stomach and the duodenum. Three major enzymes are used: pepsin, which is secreted in the stomach, and trypsin and chymotrypsin which are secreted in the pancreas.
Digestion of Fats
Some of the digestion of fats such as those found in the meat patties, "special sauce", and the cheese in a Big Mac take place in the mouth; however, most of the fat digestion done in the body is done in the small intestine. When fats enter the small intestine, enzymes from the liver and pancreas are released that help aid the digestion.
Digestion of Sugars and Starches
Sugars and starches are composed of glucose and are arranged in long chains; a polysaccharide. During digestion, salivary and pancreatic amylase break the bonds that hold the glucose together forming smaller glucose molecules that are then absorbed by the small intestine.
Roles of Accessory Organs
The pancreas secretes many helpful enzymes that are used in the breakdown of food in the body.
The salivary glands produce saliva that provides moisture for the entire digestive system.
The gallbladder holds bile produced in the liver tha is used for digesting fatty foods in the small intestine.
The liver is the storage place for the body's required nutrients.
The Rectum and Anus
The rectum and anus form the end of the digestion system. They are located at the end of the large intestine. The anus is where the digested food is expelled from the body.