Duodenum cross section
Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Jr., Ph.D.
Peer Review Status: Externally Peer Reviewed
Human, Helly's fluid, H. & E., 612 x.
Bundles of smooth muscle fibers separated by connective tissue septa. Each fiber is characterized by abundant sarcoplasm and central nucleus. Myofibrils are not seen in smooth muscle. Note variation in cross-sectional diameter, which can be accounted for on the basis of their spindle shape (as seen in longitudinal section).
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