Small intestine 

The picture " " can link to it's
corresponding histological photograph. 

The picture " " can link to it's
corresponding histological drawing.




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Small intestine


( NN-15-a )
   upper -- duodenum
   middle -- jejunum
   lower -- ileum

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   Duodenum (NN-11L)


Mucosa

»»  Surface epithelium
»»  Striated border
»»  Goblet cells--stained blue in Azan stain
»»  Columnar absorbing cells
»»  Lamina propria
      central lacteal
»»  Muscularis mucosae
»»  Crypts of Lieberkuhn ( Intestinal gland )

Submucosal glands

»»  Brunner's gland

Tunica muscularis

»»  Inner circular layer
»»  Outer longitudinal layer
»»  *Auerbach's plexus
     -- located between these two muscular layers

   b. Jejunum 

( NN-13-c )

Villi--longer

»»  No Brunner's gland in jejunum

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   c. Ileum 

( N-14-b, HE )

»»  Peyer's patches , Aggregated lymphatic nodules

   d. Ileocecal valve 

( NN-15-b, human )  

»»  a thickened extension of muscularis mucosa
»»  lymphoid tissue
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