The Digestive System

Abstract

This research paper is a brief outline for the human digestive system of human beings. This paper will initially discuss the various organs and parts of digestive system. Then we will discuss the diseases related to it and whcich parts they are effecting of Human Digestive System.

The Digestive System

The digestive system is the set of organs (mouth, pharynx, esophagus, stomach, small intestine and large intestine) in charge of the process of digestion, i.e. the transformation of food, so they can be absorbed and used by the cells of the body. The function performed is the transport (food), secretion (digestive juices), absorption (nutrients) and excretion (through the process of defecation). The digestion process is the same in all animals monogastric: transform carbohydrates, lipids and proteins into simpler units. The digestive enzymes can be absorbed and transported within the blood. The digestive system is a group of organs, glands associated with it. It is responsible for converting food into simple substances and readily usable by the body. Here are the oragns and parts of Human digestive system and the diseases which effect them..

Anatomical description

Digestive tube structure

The gastrointestinal tract is also an organ called the alimentary canal or gastrointestinal tract presents a prototypical systematization begins in the mouth and extends to the anus. Its length in humans is 10 to 12 meters, with six or seven times the total body length.

Esophagus

The esophagus is a tube or muscle membrane extending from the pharynx to the stomach. Of the incisors to cardia (portion where the esophagus is continuous with the stomach) are about 40 cm. The esophagus begins at the neck, crosses the whole thorax and enters the stomach through the esophageal orifice of the diaphragm. Typically a virtual cavity (i.e. that its walls are attached and only open when the bolus passes). 

Stomach

The stomach is an organ that accumulates in the food. Varies depending on the filling status (amount of food content present in the gastric cavity) that is usually shaped J. It consists of several parts: fundus, body, antrum and pylorus. Its edge is called curvature less extensive less and the other greater curvature. The cardia is the boundary between the esophagus and stomach and the pylorus is the boundary between the stomach and small intestine. In an individual is approximately 25 cm from the pylorus and cardiac diameter is 12cm transverse.

In the stomach digestion is performed:

Proteins (mainly pepsin).

Lipids .

No digestion occurs carbohydrates .

Other functions of the stomach are eliminating the bacterial flora that comes with food by the action of hydrochloric acid.

Small intestine

The small intestine begins in the duodenum (after the pylorus) and terminates at the ileocecal valve , which joins the first part of the intestine. Its length is variable and its size decreases gradually ...