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Transmission electron micrograph showing cell types, membranes and hook(s) in a nonactivated oncosphere of Taenia ovis. Abbreviations: GC, germinative cell; H, hook; HRM, hook region membrane; MMGC, median mesophoric gland cell; MSC, median somatophoric cell; N, nucleus; NCP, nerve cell process; OM, oncospheral membrane; OT, oncospheral tegument; PG1, penetration gland cell type 1; PG2, penetration gland cell type 2; SC, somatic cell.
