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Fig. 6 | Zoological Letters

Fig. 6

From: A comprehensive comparison of sex-inducing activity in asexual worms of the planarian Dugesia ryukyuensis: the crucial sex-inducing substance appears to be present in yolk glands in Tricladida

Fig. 6

Histological analysis of test worms obtained by the administration of the EtOAc layer of B. nobile. Embedded a test worm fed with about ten times the standard dose of the EtOAc layer of B. nobile was sagittally sectioned and stained with HE. The dorsal sides are at the top. a ovary, b copulatory apparatus, e testes, and f yolk glands. (c and d) High magnification of the area squared by the yellow line in (a and b), respectively. Domains bound by the red line in (a), the blue line in (e), and the orange line in (f) are the female germ cell masses (ovaries), the male germ cell masses (testes) and yolk glands, respectively. The cells indicated by the yellow arrow in (c) and green arrow in (e) are an oocyte and a spermatid, respectively. Ca, common antrum; Cb, copulatory bursa; Bs, bursa stalk; In, intestine; Ph, pharynx

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Zoological Letters

ISSN: 2056-306X

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