The Gastrointestinal Tract ( The ) Essay

1324 Words Nov 23rd, 2014 6 Pages
The Gastrointestinal System The gastrointestinal tract is a collection of organs that work together to enable the body to digest and absorb numerous substances. It is often described as a long muscular tube starting at the mouth, and ending at the anus. The esophagus, stomach, small intestine (consisting of the duodenum, jejunum, and the ileum), and the large intestine (consisting of the cecum, ascending, transverse, and descending colon, the sigmoid, rectum, and anus), all make up the gastrointestinal tract. The esophagus is the starting point for the gastrointestinal tract, it is a muscular tube that measures approximately twenty-five centimeters from the pharynx to the stomach. It passes through the diaphragm, and has two curvatures which allow the esophagus to correspond with the vertebrae. The esophagus then attaches to the stomach at the cardiac orifice. The stomach is located in the left upper quadrant of the abdomen and measures two to six centimeters thick non-distended on ultrasound. It is divided into three parts: the fundus, the body, and the antrum. The fundus is the largest, most superior portion of the stomach. The body is between the fundus and the antrum. The antrum leads to the pylorus, which connects the stomach to the duodenum (the first part of the small intestine). The stomach also has a lesser and a greater curvature. The greater curvature is covered by peritoneum and attaches to the greater omentum. The lesser curvature forms the right border of the…

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