Page 564 - Atlas of Histology with Functional Correlations
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parasympathetic ganglia of the submucosal (Meissner) nerve plexus (20) can
be seen deeper in the submucosa.
The muscularis externa (5, 6, 7) consists of three layers of smooth muscle,
each oriented in a different plane: an inner oblique (5), a middle circular (6),
and an outer longitudinal (7) layer. The oblique layer is not complete and is not
always seen in sections of the stomach wall. In this illustration, the circular layer
has been sectioned longitudinally and the longitudinal layer transversely.
Located between the circular and longitudinal smooth muscle layers is a
myenteric (Auerbach) nerve plexus (22) of parasympathetic ganglia and nerve
fibers.
The serosa (8) consists of a thin outer layer of connective tissue that overlies
the muscularis externa (5, 6, 7) and is covered by a simple squamous
mesothelium of the visceral peritoneum (8). The serosa can contain adipose
cells (23).
FIGURE 14.10 ■ Stomach: fundus and body region (transverse section). Stain:
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