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29 Cards in this Set
- Front
- Back
- 3rd side (hint)
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main functions of the small intestine are
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continue in the duodenum the digestive process initiated in the stomach
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to absorb digested food after enzymes produced in the intestinal mucosa and the pancreas, together with the emulsifying bile produced in the liver, enable uptake of protein, carbohydrate, and lipid components.
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emulsifying bile produced in the
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liver
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Small intestine
4 to 7m long divided into three sequential segments: |
duodenum
jejunum ileum |
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wall of the small intestine
consists of 4 layers = |
mucosa
submucosa muscularis serosa differences are seen in the ___________ & ___________ layers are similar in _____ & ____ |
mucosa and submucosa
muscularis externa and serosa |
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Small intestine
Histologic differences are seen in 2ct |
mucosa
submucosa |
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Small intestine
layers are similar 2ct |
muscularis externa
serosa |
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Small intestine
4 degrees of folding amplify the absorptive surface area |
plicae circulares
intestinal villi intestinal glands microvilli -- on the enterocytes |
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______ __________ is a permanent fold
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plica circularis
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The intestinal villi are ______ ______
projections |
finger-like
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Microvilli of the
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enterocytes
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Crypts of Lieberkühn, or intestinal glands, are
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simple tubular glands
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Small intestine
lining is What kind of epithelium |
is simple columnar
which contains ______ cells besides enterocytes. |
goblet
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Small intestine
The lamina propria is composed of |
loose connective tissue
blood and lymph vessels nerve smooth muscle |
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the boundary between the mucosa and submucosa.
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muscularis mucosae
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muscularis mucosae
is the boundary between the ____________ & _____________ |
mucosa and submucosa.
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___________ a thin layer of connective tissue, covered by the visceral peritoneum (simple squamous mesothelium).
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serosa
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serosa, a thin layer of connective tissue, covered by
_________ ____________ |
visceral peritoneum
Which is what kind of mesothelium = |
(simple squamous mesothelium).
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Microcirculation of the small intestine
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..
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Histologic differences between the
duodenum == #1-5 jejunum ileum |
#1
-Brunner's glands in -submucosa -tubuloacinar mucous glands -alkaline secretion (pH 8.8 to 9.3) -neutralizes the acidic chyme 2. villi are broad and short (leaflike shape). 3. incomplete serosa extensive adventitia. 4. collects bile Oddi 5 Paneth cells |
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base of the crypts of ...called ____________?
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Lieberkühn
Lieberkühn contain what type of cells = |
Paneth cells
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Histologic differences between the
duodenum jejunum == 1-4 ileum |
1-Long finger-like villi
2-No Brunner's glands 3-Peyer's patches 4-Paneth cells |
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Histologic differences between the
duodenum jejunum ileum == 1-3 |
1Peyer's patches,
(Lymphoid Follicles ( nodules) ) s2horter finger-like villi |
Ileum
Peyer's patches, lymphoid follicles (also called nodules) found in the mucosa and part of the submucosa. The lack of Brunner's glands and the presence of shorter finger-like villi-when compared with the jejunum-are additional landmarks of the ileum. As in the jejunum, Paneth cells are found at the base of the crypts of Lieberkühn. 3 Paneth cells |
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Histologic differences between the
duodenum jejunum ileum picture info |
..
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lactose intolerance
What type of Defect? Defect in what ? |
Genetic
Defect in = Lactase |
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Enterokinase and aminopeptidase
degrade what = |
oligopeptides into =
3ct |
dipeptides
tripeptides amino acids |
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Cytoplasmic peptidases degrade dipeptides and tripeptides into =
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amino acids
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closed ended, it has a very small volume capacity and frequently becomes a site of inflammation =
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appendicitis
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submucosa of the anal columns contain branches of the superior rectal artery and the rectal venous plexus. Enlargement of these submucosal veins constitute
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hemorrhoids
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oligopeptides are broken down by what 2 enzymes =
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Enterokinase
aminopeptidase The 2 above enzymes degrade Oligopeptides into = |
dipeptides
tripeptides amino acids |
