scheme excretory system pheretima earthworm with pharyngeal integumentary and septal nephridia for biology lesson |
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| navigate by keyword : zoology worm white vector undefined system structure septal science scheme schematic schema protonephridia praepinguis pheretima pharyngeal nephrostome nephridium nephridial nephridia morphology metanephridia material lumbricus lesson isolated internal integumentary excretory element educational earthworm diagram detail darnleiensis biology background animal anatomy |
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| Scheme of excretory system of Pheretima earthworm with pharyngeal, integumentary and septal nephridia for biology lesson. Diagram of excretory system of earthworm |
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