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