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3 pages/≈825 words
2 Sources
Health, Medicine, Nursing
English (U.S.)
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Digestive system (Essay Sample)


Answer the following question in the essay: 1. Describe the processes involved in the digestion and absorption of carbohydrates, lipids and proteins.  2. Discuss the energy produced from the catabolism of carbohydrates, lipids and fats. Which molecule provides the most energy when metabolized?  Could you pls either bold, underline sentences/paragraph that is cited.


The human digestive system is a complex series of organs and glands that processes and converts food into energy and basic nutrients to feed the entire body. The digestive system is essentially a long, twisting tube (The alimentary canal or the gastrointestinal tract (GI tract).) that runs from the mouth to the anus, plus a few other organs like the liver and pancreas that produce or store digestive chemicals
The alimentary canal processes different types of food components every day through the use of enzymes and digestive juices. Carbohydrates, proteins and lipids all pass through the alimentary canal at different pace, and are broken down into unique components and are then absorbed into the body for use as fuel or to repair and build muscles, bones and organs.
Carbohydrates start to digest in the mouth where the process of chewing breaks down food into small pieces then the enzymes in the saliva breaks the complex molecules into simpler sugars which are then swallowed down to the esophagus and stomach with some more digestion. Carbohydrates then move to the small intestine where enzymes produced by the pancreas break down the carbohydrates into the simplest sugar molecules, which are then absorbed by the small intestine walls into the bloodstream and used by the body or sent to the liver for storage for use at a later time. Fiber, an indigestible cell wall which is f...
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