Semifine
cross-section of duodenum stained with
toluidine blue and observed with the
objective of 4x. In this microphotography we
can observe the different layers that
integrate the duodenal wall:
muscular,
submucous
and
mucous,
which extends towards the lumen by means of
folds or
intestinal villi.
Details of the villi and these layers can be
viewed at higher magnification in other
microphotographies (zones framed in blue and
red)