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Cari koleksi dengan cepat sesuai kebutuhan Anda.Cnidarians are considered ‘‘nerve net animals’’ even though their nervous systems include various forms of condensation and centralization. Yet, their broad, two-dimensional muscle sheets are innervated by diffuse nerve nets. Do the motor nerve nets represent a primitive organization of multicellular nervous systems, do they represent a consequence of radial symmetry, or do they offer a…