Gourt > Health > Conditions and Diseases > Cancer > Gastrointestinal > Small Intestine (1)
In biology the small intestine is the part of the gastrointestinal tract between the stomach and the large intestine (colon). In humans over 5 years old it is 5-6m long. It is divided into three structural parts: duodenum, jejunum and ileum. Food from the stomach is allowed in to the duodenum by a muscle called the pylorus, or pyloric sphincter, and is then pushed through the small intestine by a process of muscular contractions called peristalsis.
The small intestine is the site where most of the nutrients from ingested food are absorbed. There are microscopic finger-like projections called villi covering the small intestinal walls which increase surface area for absorption. Each villus contains a lacteal and capillaries. The lacteal absorbs the digested fat into the lymphatic system which will eventually drain into the circulatory system. The capillaries absorb all other digested nutrients.
Although the small intestine is much longer than the large intestine (typically 4-5 times longer), it is referred to as such due to its comparatively smaller diameter. On average, the diameter of the large intestine of an adult human measures approximately 3 times the diameter of the small intestine. Upon viewing accurate diagrams of the digestive system, non-medically trained personnel often initially express bemusement as to why the obviously longer portion of the digestive system is referred to as the small intestine.
More on [ Small intestine ]
#IBS #SIBO Irritable bowel syndrom IBS and Small intestine bacterial overgrown SIBO http://t.co/5OQEzSr2
PSedesseMD (Peter Sedesse MD) Sun, 15 Jan 2012 18:06:22 -0000
#IBS #SIBO Irritable bowel syndrom IBS and Small intestine bacterial overgrown SIBO http://t.co/5OQEzSr2
Anyone know why the small intestine has many blood vessels in its walls?
gemma_lovescher (geem.) Sun, 15 Jan 2012 17:53:48 -0000
Anyone know why the small intestine has many blood vessels in its walls?
my large intestine is munching on my small intestine
EpitomeOfFaith (Denise M. Cambridge) Sun, 15 Jan 2012 17:19:43 -0000
my large intestine is munching on my small intestine
Stomach acid-reducing drugs appear to cause small intestine damage
yjumafiry (Alex Wong) Sun, 15 Jan 2012 17:17:06 -0000
Stomach acid-reducing drugs appear to cause small intestine damage
RT @swollenvoice: This girl just yawned so big I could see her small intestine.
gunstar1 (J Allen Grim) Sun, 15 Jan 2012 17:03:50 -0000
RT @swollenvoice: This girl just yawned so big I could see her small intestine.
@rebeccahohj Haha! The large and small intestine
Da___niel (Daniel Lee ) Sun, 15 Jan 2012 15:40:05 -0000
@rebeccahohj Haha! The large and small intestine
NCI: Small Intestine Cancer - Provides general disease description, stages, recurrence rate, summary about the treatment of small intestine cancer, and health professional information.
Meta Description: [ Expert-reviewed information summary about the treatment of small intestine cancer. ]
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