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Fig. 6 | Zoological Letters

Fig. 6

From: Progesterone initiates tendril formation in the oviducal gland during egg encapsulation in cloudy catshark (Scyliorhinus torazame)

Fig. 6

Tendril formation in the oviducal gland during the naturally-progressing egg-laying cycle. A, B The individual representing the first day of P4 surge. C, D The catshark in which capsulated eggs appeared in the oviducts. This individual probably represents the third day of P4 surge. A, C Magnified view of the oviducal gland. Tendrils (arrowheads) were extended from the middle portion of oviducal glands. B, D Observation of the formed tendrils (arrowheads) using a scanning electron microscope. Scale bars, 1 cm (A, C) and 300 µm (B, D)

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Zoological Letters

ISSN: 2056-306X

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