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The small intestine or small bowel is an organ in the gastrointestinal tract where most of the absorption of nutrients from food takes place. It lies between the stomach and large intestine, and receives bile and pancreatic juice through the pancreatic duct to aid in digestion. The small intestine is about 5.5 metres (18 feet) long and folds ...
The cecum is a pouch marking the division between the small intestine and the large intestine. It lies below the ileocecal valve in the lower right quadrant of the abdomen. [33] The cecum receives chyme from the last part of the small intestine, the ileum, and connects to the ascending colon of the large intestine. At this junction there is a ...
Intestinal ischemia is a medical condition in which injury to the large or small intestine occurs due to not enough blood supply. [2] It can come on suddenly, known as acute intestinal ischemia, or gradually, known as chronic intestinal ischemia. [ 1 ]
Small intestine : major site of absorption. Symptoms can manifest in a variety of ways and features might give a clue to the underlying condition. Symptoms can be intestinal or extra-intestinal - the former predominates in severe malabsorption. [citation needed] Diarrhoea, often steatorrhoea, is the most common feature. Watery, diurnal and ...
Other causes include damage to the small intestine from other means and being born with an abnormally short intestine. [1] It usually does not develop until less than 2 m (6.6 ft) of the normally 6.1 m (20 ft) small intestine remains. [1] [3] Treatment may include a specific diet, medications, or surgery. [1]
Diseases of the small intestine may present with symptoms such as diarrhoea, malnutrition, fatigue and weight loss. Investigations pursued may include blood tests to monitor nutrition, such as iron levels , folate and calcium , endoscopy and biopsy of the duodenum, and barium swallow .
The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding. Digested blood from the upper gastrointestinal tract may appear black rather than red, resulting in "coffee ground" vomit or melena. [2] Other signs and symptoms include feeling tired, dizziness, and pale skin color. [18]
Types of mesenteric ischemia are generally separated into acute and chronic processes, because this helps determine treatment and prognosis. [ 4 ] Bowel obstruction is most often caused by intestinal adhesions , which frequently form after abdominal surgeries, or by chronic infections such as diverticulitis , hepatitis , and inflammatory bowel ...