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Fig. 4 | Zoological Letters

Fig. 4

From: Structural and bio-functional assessment of the postaxillary gland in Nidirana pleuraden (Amphibia: Anura: Ranidae)

Fig. 4

Transmission electron micrographs of SMGs in the postaxillary glands of male N. pleuraden. a Longitudinal section of SMGs, note the microvilli and the desmosome connecting two contiguous mucocytes. b A euchromatic nucleus surrounded by numerous secretory granules. c Translucent vesicles are released from large secretory granules via a breach on granular border. d Secretory granules hold materials of varying electron-density, note the dilated rough endoplasmic reticulum at the supranuclear region. e The discontinuous myoepithelial sheath across the secretory unit and glandular stroma, note the plasmalemmal projection of the mucocytes (arrow). f supranuclear cytoplasm of the mucocyte contains lipid droplets in low electron-opaque. sg, secretory granule; mv, microvilli; ds, desmosome; rer, rough endoplasmic reticulum; v, vesicle; No, nucleolus; Nu, nucleus; , breach of the secretory granule; G, Golgi stack; mec, myoepithelial cell; my, myofilament; st, stroma; pv, pinocytotic vesicle; ld, lipid droplet. Bars = 1 μm (a, b, e, f) and 0.5 μm (c, d)

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