Protonephridium is a network of dead end tubules lacking internal openings found in the phyla Platyhelminthes, vintage line drawing or engraving illustration.

Protonephridium is a network of dead end tubules lacking internal openings found in the phyla Platyhelminthes, vintage line drawing or engraving illustration. - 132823141

This illustration represents Nerve Cell, vintage line drawing or engraving illustration.

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