small intestine


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.
Related to small intestine: Small intestine cancer

small in·tes·tine

[TA]
the portion of the digestive tube between the stomach and the cecum (beginning of the large intestine); it consists of three portions: duodenum, jejunum, and ileum; its primary function is the continued digestion of chyme and the absorption of nutrients into the lymphatic (fats) and portal venous system, through its mucosal surface, which is highly modified to provide surface area for this purpose.
Synonym(s): intestinum tenue [TA]
Farlex Partner Medical Dictionary © Farlex 2012

small intestine

n.
The narrow, winding, upper part of the intestine where digestion is completed and nutrients are absorbed by the blood. It extends from the pylorus to the cecum and consists of the duodenum, the jejunum, and the ileum. Also called small bowel.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

small in·tes·tine

(smawl in-tes'tin) [TA]
The portion of the digestive tube between the stomach and the cecum or beginning of the large intestine; it consists of three portions: duodenum, jejunum, and ileum.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

small intestine

The longest, but narrowest part of the intestine. The part in which digestion and absorption of food is performed. The small intestine extends from the outlet of the stomach (the PYLORUS) to the CAECUM at the start of the large intestine (COLON), and consists of the DUODENUM, the JEJUNUM and the ILEUM.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

small intestine

a narrow tube, which in humans is over 7m long, linking the stomach to the caecum. It is divided into an anterior part, the duodenum (25 cm), a central part, the jejunum (5.6 m) and a posterior part, the ileum (125 cm). CHYME from the stomach stimulates secretion of PANCREATIC JUICE on passing into the duodenum. Bile is added from the liver and flows into the duodenum through the bile duct. The jejunum has a larger diameter than the duodenum and larger VILLI than the rest of the intestine; it is the main absorptive region.

Large amounts of MUCUS are produced by the glandular cells, and a number of enzymes including maltase, peptidases, sucrase, lactase, enterokinase and nucleotidases are also secreted. The enzymes are thought to be largely produced in the CRYPTS OF LIEBERKUHN. The secretions of the small intestine are collectively called the succus entericus. The entire intestinal lining in humans is replaced every 36 hours and is the main site of the absorption of food.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
The primary neoplasms of small intestine are relatively rare and difficult for diagnosis.
[11] varied the four different types of metastatic melanoma of the small intestine: cavitary, inflitrating, exoenteric and polypoid.
The small intestine sign says "Sorry, no calcium." The bone sign says "I'm building."
Pneumocystis carinii infection of the small intestine in a patient with acquired immune deficiency syndrome.
According to Table 2, adding probiotic to the diet of the broilers at different ages and transferred to different parts of the small intestine caused variety of influences on the activity of LAP enzyme.
Effect of CORT administration on ADFI, the weight of liver and the weight and length of small intestine of broiler chickens
Enteric coatings are commonly used to prevent drug release in the stomach, but allow release as the dosage form enters the small intestine and the pH increases.
Gluten is found in wheat, oats, rye and barley - removing these from the diet stops the attacks on the small intestine and will allow it to heal.
Preliminary results from a large, randomized, placebo-controlled clinical trial for patients with primary gastrointestinal stromal tumor (GIST), a type of tumor usually found in the stomach or small intestine, showed that patients who received imatinib mesylate (Gleevec A[R]) after complete removal of their tumor were significantly less likely to have a recurrence of their cancer compared to those who did not receive imatinib.
The discovery that the small intestine communicates with the liver to control the production of bile acids is a finding that has great medical implications in treating people at risk for certain types of liver disease, declare researchers at the University of Texas Southwestern Medical Center, Dallas.
The 18-month-old had her liver, pancreas, small intestine, large intestine, stomach and spleen replaced with organs from a single donor.

Full browser ?