Human Digestion - Secretions of bile, a dark green or...

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Human Digestion Rachel Crice May 23, 2011 SCI/241 Jana Fraser Axia College of University of Phoenix Human digestion begins with salivary glands. The food enters the mouth and is moistened by saliva and chewed. Once chewed the food becomes a bolus. The bolus moves into the pharynx where it is swallowed and moved into the esophagus. The esophagus connects the pharynx to the stomach. Once the bolus travels the esophagus into to the stomach, it is mixed with gastric acids and turns into chyme. Chyme is a semi liquid food mass. Food is only partially digested once in the stomach and can take anywhere between two and six hours depending on the amount of food and its overall make up. Most of digestion and absorption of nutrients takes place in the small intestines.
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Unformatted text preview: Secretions of bile, a dark green or yellowish liquid produced by the liver, help with the absorption and digestion of fats. Digestive enzymes and bicarbonate secretions from the pancreas help in the process of digestion, as well. Bile, enzymes, and other secretions all help to break down the bolus. Once the bolus has left the small intestine, it enters the large intestine. Here in the large intestine, the body absorbs water and vitamins from the now broken down bolus. The large intestine is made up of the colon and the rectum. The product that isnt absorbed in the colon is then extracted from the body through the anus in the form of feces....
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