2-4. Gill, filaments: (HE-40X)
Gills are diffusely thickened and variably hypercellular. Many filaments are expanded by the presence of large trophonts with a horseshoe-shaped macronucleus (arrows).
. Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México. Mexico City, Mexico. Web site: http://fmvz.unam.mx/fmvz/departamentos/patologia/acerca.html)
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 are present on the skin, as well as on the mucosa of the oral and branchial cavity. ');)
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2-4. Gill, filaments: (HE-40X) Gills are diffusely thickened and variably hypercellular. Many filaments are expanded by the presence of large trophonts with a horseshoe-shaped macronucleus (arrows). | ||||
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