Section of esophagus (upper third) stained with
the zinc iodide-osmium tetroxide method and
observed with the objective of 40x. Next to the
striated muscle fibers appear some
osmium-stained bundles of
nervous fibers,
which form
motor end plate-type
terminal elements. One of them can be observed
at higher magnification in other
microphotography (zone framed in red)