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Light microscopy of gametogenesis in T. mutabilis. a) Oogonia (Og), attached to the follicle wall with the presence of two nucleoli (nu) b) Primary growth oocytes with increase of germinal vacuole (Gv) and presence of a single nucleolus c) Secondary growth oocyte, cytoplasmic volume expansion and yolk granule (Yg) accumulation d) Vitellogenic oocyte. Germinal vesicle migration (Gv) to the periphery of the oocyte. Accumulation and increase of yolk granules (Yg). e) Detail of seminal tube on mature male. Observation of the different stages of spermatogenesis. Spc Spermatocyte Spd Spermatid Spg Spermatogonia Spz Spermatozoa.Scale bars = 50μm. Scale bars = 50 μm.
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