Term
| What helps distinguish b/w Stomach and Small intestine |
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Definition
| The appearance of villi in small intestine |
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Term
| Small Intestine: What is the epithelium, primary function and what are the 3 parts? |
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Definition
Simple Columnar
digestion and absorption of nutrients
Duodenum, jejunum, ileum |
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Term
| Duodenum - 2 characteristics |
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Definition
well developed, leaf shaped villi
and Brunner's glands: secrete mucus and bicarb |
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Term
| Jejunum - 3 characteristics |
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Definition
well developed plica
finger shaped villi contain a lacteal
enterocyte goblet cells in epithelium |
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Term
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Definition
Peyer's patches - organized lymph tissue in lamina propria and submucosa
Shorter villi |
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Term
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Definition
intestinal immune response from Peyers Patches
eosinophils, macrophages, neutrophils, IgA
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Term
| Crypts of Lieberkuhn: open into interviller spaces and contain what kind of cells? |
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Definition
-surface absorptive cells- most important, absorbs end products of digestion, breaks down dissacharids and peptides
-Goblet cells - produce mucus
-enteroendocrine - secrete hormones
-regenerative cells - highly mitotic
-paneth cells- dark staining granules contain lysozyme, antibacterial action
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Term
| What will distinguish b/w small and large intestine |
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Definition
| absence of villi in large intestine |
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Term
| Large Intestine: what is the main function and what are the different parts |
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Definition
process and excrete fecal matter
Cecum, appendix, ascending colon, transverse colon, descending colon, sigmoid colon, rectum, anal canal |
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Term
Colon:
Characteristics, function, and specialized structure |
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Definition
No villi, straight crypts, many goblet cells
to absorb water and electrolytes
longitudinal muscle gets thicker to form tenia coli |
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Term
Inflammatory Bowel Disease:
2 types |
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Definition
ulcerative colitis- colon only
Crohn's - any part of GI |
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Term
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Definition
cecum - more absorptive cells and lamina propria is more dense
Rectum- more goblet cells |
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Term
Appendix:
where does it come from?
distinguishing factors?
problems? |
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Definition
outpocketing of Cecum
presence of lymphoid cells
no tenia coli
can be easily infected = appendectomy |
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Term
Rectum:
epithelium Transition?
Pectinate line? |
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Definition
anal canal is simple columnar and anus is stratified squamous
very important landmark designates epithelium transition
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