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The duodenum is the first section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear, and the terms anterior intestine or proximal intestine may be used instead of duodenum. [7] In mammals the duodenum may be the principal site for iron ...
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 intestine is also called the bowel or the gut. The lower GI starts at the pyloric sphincter of the stomach and finishes at the anus. The small intestine is subdivided into the duodenum, the jejunum and the ileum. The cecum marks the division between the small and large intestine. The large intestine includes the rectum and anal canal. [2]
The following enzymes/hormones are produced in the duodenum: secretin: This is an endocrine hormone produced by the duodenal "S cells" in response to the acidity of the gastric chyme. Cholecystokinin (CCK) is a unique peptide released by the duodenal "I cells" in response to chyme containing high fat or protein content.
The function of the GI tract is to process ingested food by mechanical and chemical means, extract nutrients and excrete waste products. The GI tract is composed of the alimentary canal, that runs from the mouth to the anus, as well as the associated glands, chemicals, hormones, and enzymes that assist in digestion.
This means you’re simultaneously cutting back on high-LDL items such as fried food, fast food, desserts, and processed meats (bacon, hot dogs, etc.), while adding more veggies, fruits, nuts ...
It can even create physical changes in the intestine, flattening the folds that help move stool through your colon and absorb nutrients along the way. ... Eat more fruits, vegetables, ...
The digestive system functions to move material through the GI tract via peristalsis, break down that material via digestion, absorb nutrients for use throughout the body, and remove waste from the body via defecation. [3] Physicians who specialize in the medical specialty of gastroenterology are called gastroenterologists or sometimes GI doctors.