Digestive System

Topics: Digestion, Stomach, Small intestine Pages: 5 (1257 words) Published: February 9, 2013
Digestive System
* uniquely constructed to perform its specialized function of turning food into the energy you need to survive and packaging the residue for waste disposal.
Parts of the digestive system:
* is the beginning of the digestive tract;
* digestion starts here when taking the first bite of food. * Chewing breaks the food into pieces that are more easily digested, while saliva mixes with food to begin the process of breaking it down 2) ESOPHAGUS

* Located in your throat near your trachea (windpipe), the esophagus * receives food from your mouth when you swallow. By means of a series of muscular contractions called peristalsis, * esophagus delivers food to your stomach.

* is a hollow organ, or "container," that holds food while it is being mixed with enzymes that continue the process of breaking down food into a usable form. * secrete a strong acid and powerful enzymes that are responsible for the breakdown process

* Contents of the small intestine start out semi-solid, and end in a liquid form after passing through the organ. * Water, bile, enzymes, and mucous contribute to the change in consistency. * Once the nutrients have been absorbed and the leftover-food residue liquid has passed through the small intestine 5) PANCREAS

* secretes digestive enzymes into the duodenum, the first segment of the small intestine. * These enzymes break down protein, fats, and carbohydrates. * makes insulin, secreting it directly into the bloodstream. Insulin is the chief hormone for metabolizing sugar. 6) LIVER

* main function is to process the nutrients absorbed from the small intestine. * Bile from the liver secreted into the small intestine also plays an important role in digesting fat. * takes the raw materials absorbed by the intestine and makes all the various chemicals the body needs to function * detoxifies potentially harmful chemicals. It breaks down and secretes many drugs. 7) GALLBLADDER

* stores and concentrates bile, and then releases it into the duodenum to help absorb and digest fats. 8) COLON (LARGE INTESTINE)
* made up of the cecum, the ascending (right) colon, the transverse (across) colon, the descending (left) colon, and the sigmoid colon, which connects to the rectum. * highly specialized organ that is responsible for processing waste so that emptying the bowels is easy and convenient * Stool, or waste left over from the digestive process, is passed through the colon by means of peristalsis, first in a liquid state and ultimately in a solid form. * As stool passes through the colon, water is removed.

* (Latin for "straight") is an 8-inch chamber that connects the colon to the anus. * receive stool from the colon, to let the person know that there is stool to be evacuated, and to hold the stool until evacuation happens. 10) ANUS

* Last part of the digestive tract.
* surrounded by sphincter muscles that are important in allowing control of stool. * The pelvic floor muscle creates an angle between the rectum and the anus that stops stool from coming out when it is not supposed to Digestive System Disorders

Digestive system disorders happen when there is a faulty function during the process of digestion which prevents some part of the digestive system from working as it should do. There are a wide number of common digestive system disorders. 1. HEPATITIS

* It is an inflammation of the liver caused by excessive intake of alcohol or virus infection * HEPATITIS has several types but the most commonly known is the Hepa A and Hepa B * Hepa A (HAV) is known as infectious hepatitis

* Hepa B (HBV) is known as serum hepatitis
* This can happen through sexual contact with an infected person or sharing needles, syringes, or other drug-injection equipment. * It can...
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