protonephridia flatworm with flame cell structure excretory system trematode |
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| navigate by keyword : anatomy animal biology cell cilia element excretory fasciola flame flatworm fluke hepatica illustration isolated liver morphology nephridia nephridium osmoregulation part physiology protonephridia protonephridium schema scheme secretory sheep structure system trematode tube urinary vector white worm |
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| Protonephridia of flatworm with flame cell. Structure of excretory system of trematode and other flatworm |
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