JEJUNUM
>Jejunal villi are longer and more irregular(characteristic feature)
>Muscularis mucosa is sparse or even absent.
>There are circular folds called "plicae circulares" or"valves of kerckring" which are formed by mucosa and submucosa and are permanent structures.They are absent in first few centimetres of duodenum and distal of ileum. They are developed in jejunum.
>There are no glands in submucosa.
>Other structures are same as that of duodenum.
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