Esophagus & Stomach Histology
Advanced Anatomy & Physiology
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Digestive System Anatomy & Histology
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Histology
Q. In the upper/proximal portion of the esophageal muscularis externa, the circular layer comprises:
a
Skeletal muscle fibers
b
Smooth muscle fibers
c
An equal combination of skeletal and smooth muscle fibers
d
Submucosal glands
e
None of the above
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