Fig. 8

Excretory system in Eudiplozoon nipponicum. A. Cross-sectioned flame bulb at the level of the basal part of the cilia. Note the terminal cell with a large nucleus and the flame bulb with a flame tuft flagellation. TEM. B. Longitudinally sectioned flame tuft flagellation showing the non-striated rootlets, external ribs arising from the proximal canal cell, internal leptotriches and internal ribs arising from the terminal cell. TEM. C. Cross-sectioned flame cell in the area of the weir apparatus. TEM. D. Region of the protonephridial duct epithelium, showing the lateral flame. TEM. E. Cross-sectioned protonephridial duct. TEM. F. A section of the convoluted excretory duct. TEM. G. Fractured flame cell with neighbouring innervation. FE, TEM. H. Fractured flame cell and protonephridial duct with neighbouring muscle fibres. FE, TEM. bb – basal bodies, ced – convoluted excretory ducts, cm – circular muscle fibres, dm – diagonal muscle fibres, el – external leptotriches, er – external ribs, ft – flame tuft, il – internal leptotriches, in – innervation, ir – internal ribs, la – lamellae, n – nucleus of terminal cell, pd – protonephridial duct, sj – septate junction, tc – terminal cell, v – vacuolated epithelium