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The stichosome (posterior glandular esophagus) of Capillaria pterophylli Heinze, 1933
consists of large gland cells (stichocytes) and lumenal epithelium with cuticular
lining. Both structures are enclosed in a reticulum of muscle cells. The stichocyte
cytoplasm contains small cisternae of rough endoplasmic reticulum, Golgi complexes,
one kind of electron dense secretory granules, mitochondria and a branching system
of intracellular collecting ducts without filament bundles around them.