【實用醫療app】Gastrointestinal USMLE S2CK QA|最夯免費app-gigacircle

Get +1300 Questions & answers and prepare your Gastrointestinal USMLE step 2 CK exam in less time and get better understanding and higher score. It's the only Gastrointestinal exam questions Bank on the android market.

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The human gastrointestinal tract, or GI tract, or GIT is an organ system responsible for consuming and digesting foodstuffs, absorbing nutrients, and expelling waste.

The tract consists of the stomach and intestines, and is divided into the upper and lower gastrointestinal tracts. However, by the broadest definition, the GI tract includes all structures between the mouth and the anus. On the other hand, the digestive system is a broader term that includes other structures, including the digestive organs and their accessories. The tract may also be divided into foregut, midgut, and hindgut, reflecting the embryological origin of each segment.

The whole digestive tract is about nine metres (30 feet) long.

Disease

There are a number of diseases and conditions affecting the gastrointestinal system, including:

Infection. Gastroenteritis is an inflammation of the intestines. It occurs more frequently than any other disease of the intestines.

Cancer may occur at any point in the gastrointestinal tract, and includes mouth cancer, tongue cancer, oesophageal cancer, stomach cancer, and colorectal cancer.

Inflammatory conditions. Ileitis is an inflammation of the ileum, Colitis is an inflammation of the large intestine.

Appendicitis is inflammation of the vermiform appendix located at the caecum. This is a potentially fatal condition if left untreated; most cases of appendicitis require surgical intervention.

Diverticular disease is a condition that is very common in older people in industrialized countries. It usually affects the large intestine but has been known to affect the small intestine as well. Diverticulosis occurs when pouches form on the intestinal wall. Once the pouches become inflamed it is known as diverticulitis.

Inflammatory bowel disease is an inflammatory condition affecting the bowel walls, and includes the subtypes Crohn's disease and ulcerative colitis. While Crohn's can affect the entire gastrointestinal tract, ulcerative colitis is limited to the large intestine.

Several symptoms are used to indicate problems with the gastrointestinal tract:

Vomiting,

Diarrhoea,

Constipation,

Blood in stool,