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L’étude de l’ovaire en microscopie photonique et électronique chez la planaire paludicole Schmidtea mediterranea, réalisée pour la première fois au cours du présent travail, a montré qu’il renferme des cellules germinales et des cellules accessoires. Les cellules germinales sont représentées par des ovocytes à différents stades de maturation. Lors de leur croissance, les ovogonies augmentent de taille...