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Microanatomy GI- Small and Large Intestine, Appendix
GI
14
Medical
Graduate
01/13/2010

Additional Medical Flashcards

 


 

Cards

Term
What helps distinguish b/w Stomach and Small intestine 
Definition
The appearance of villi in small intestine 
Term
Small Intestine: What is the epithelium, primary function and what are the 3 parts? 
Definition

Simple Columnar 

 

digestion and absorption of nutrients

 

Duodenum, jejunum, ileum 

Term
Duodenum - 2 characteristics 
Definition

well developed, leaf shaped villi 

 

and Brunner's glands: secrete mucus and bicarb

Term
Jejunum - 3 characteristics  
Definition

well developed plica 

 

finger shaped villi contain a lacteal 

 

enterocyte goblet cells in epithelium 

Term
Ileum- 2 characteristics 
Definition

Peyer's patches - organized lymph tissue in lamina propria and submucosa

 

Shorter villi 

Term
GALT 
Definition

intestinal immune response from Peyers Patches 

 

eosinophils, macrophages, neutrophils, IgA 

 

Term
Crypts of Lieberkuhn: open into interviller spaces and contain what kind of cells? 
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 

 

Term
What will distinguish b/w small and large intestine 
Definition
absence of villi in large intestine 
Term
Large Intestine: what is the main function and what are the different parts 
Definition

process and excrete fecal matter 

 

Cecum, appendix, ascending colon, transverse colon, descending colon, sigmoid colon, rectum, anal canal

Term

Colon: 

Characteristics, function, and specialized structure

Definition

No villi, straight crypts, many goblet cells 

 

to absorb water and electrolytes 

 

longitudinal muscle gets thicker to form tenia coli 

Term

Inflammatory Bowel Disease: 

2 types 

Definition

ulcerative colitis- colon only 

 

Crohn's - any part of GI 

Term
Compare rectum vs. Cecum 
Definition

cecum - more absorptive cells and lamina propria is more dense

 

Rectum- more goblet cells 

Term

Appendix:

where does it come from? 

distinguishing factors? 

problems? 

Definition

outpocketing of Cecum 

 

presence of lymphoid cells

 

no tenia coli

 

can be easily infected = appendectomy

Term

Rectum: 

epithelium Transition? 

Pectinate line? 

Definition

anal canal is simple columnar and anus is stratified squamous

 

very important landmark designates epithelium transition 

 

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