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Digestive system Essay Topics & Paper Examples

Digestive System

The digestive system is a long tube inside the rat, with the mouth as the opening at the anterior end and the anus as the opening at the posterior end. The process of digestion, the enzymatic breakdown of complex food substances into their simpler components, occurs in the lumen (cavity) of the digestive tube. The small molecules resulting from digestion are then absorbed by the cells lining the gut and transferred to all the other cells of the body via the circulatory system. Within the cells, these molecules may be burned to release energy for cellular activity, built into the structural elements of the cell, or stored for later use. The undigested material passes along the gastrointestinal tract and out…

The Function and Mechanics of the Digestive System

In this paper I will explain the function and mechanics of the digestive system. The body’s method of taking the food we eat and breaking it down to obtain vital nutrients that will allow us to live and be healthy is digestion. According to “Wikipedia. com” (2013), “Digestion is a form of catabolism: a breakdown of large food molecules to smaller ones, it is the mechanical and chemical breakdown of food into smaller components that are more easily absorbed into a blood stream” (Digestion). Digestion time varies between individuals and between men and women. After you eat, it takes about six to eight hours for food to pass through your stomach and small intestine. Food then enters your large intestine…