Parts of Small Intestine

1. Duodenum. The major distinguishing feature of this C-shaped first part of the small intestine is the presence of duodenal (Brunner's) glands in the submucosa. The mucous cells of these glands produce an alkaline secretion. It protects the duodenal lining from the acidity of the chyme and raises the luminal pH to the optimum level for pancreatic enzyme activity. It is also the point of entry for the bile and pancreatic ducts, which penetrate the full thickness of the duodenal wall. It typically exhibits fingerlike or leaflike villi and relatively few goblet cells.

2. Jejunum. An intraperitoneal organ, the jejunum has long leaflike vilii, many plicae circulares, and an intermediate number of goblet cells. The key to its identification, however, is that although it has villi (and is thus part of the small intestine), it contains neither Brunner's glands nor Peyer's patches.

3. Ileum. This intraperitoneal organ has fewer villi, which are short and broad-tipped (clublike), and relatively abundant goblet cells.

9 comments:

Anesha said...

Hi Nice Blog . In this, the body is studied by regions rather than by organs. This is of importance to the surgeon who exposes different planes after the skin incision and who, of course, must be perfectly familiar with structures as he explores the limbs and human endocrine system cavities.

Anonymous said...

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ultrasonic liposuction guide said...

The small and large intestines perform different functions. The small intestine is where the most extensive part of digestion occurs. Most food products are absorbed in the small intestine.

alisha said...

can u plz tell me whose lumen is the broadest one among the three parts of smal intestine..

Anonymous said...

what do each section of the intestines do in the digestive system is wat im asking!!!

Anonymous said...

hi

Anonymous said...

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Anonymous said...

thanx for the photo of digestive system