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Fig. 6 | Helgoland Marine Research

Fig. 6

From: The development of the oviducal gland in the Rajid thornback ray, Raja clavata

Fig. 6

Secretory material produced by the secretory tubules from the four zones of the oviducal gland of a spawning capable/actively spawning female. PAS/AB. a Club zone with PAS+ and AB+ secretory material stored inside the tubules. b Secretory tubules of the club zone with PAS+ and AB+ secretory material stored inside the secretory cells. c Structural organization of the different regions of the papillary zone. d Secretory tubules of the papillary zone, containing PAS+ and AB+ secretory material. e Papillary secretory tubules near the lumen containing PAS+ secretory granules. f Caudal-most papillary tubules containing AB+ secretory material. g Baffle zone secretory tubules PAS− and AB−. h Terminal zone mucous secretory tubules containing AB+ secretory material and serous secretory tubules PAS− and AB−. i Mucous secretory tubules (terminal zone) containing AB+ secretory material stored inside secretory cells. CT connective tissue, ST secretory tubules, Lm lamellae, Ov oviduct, SC secretory cell, CC ciliated cell, L Lumen, STLm secretory tubules near the lamellae on papillary zone, CmST caudal-most secretory tubules on papillary zone, SM secretory material, PP plateau projection, TG transverse groove, BP basal plate, S spinneret, SST serous secretory tubules, MST mucous secretory tubule

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