Protonephridium — Free Biology Illustration | GPAI | GPAI

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Protonephridium — Free Biology Illustration | GPAI | GPAI

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Protonephridium

Protonephridium

Biology

Protonephridium

A delicate protonephridial excretory system shown as a fine branching network of thin, pale translucent tubules spreading like roots and converging into narrow winding ducts. The tubules are dead-end branches that terminate in small bulb-like flame cells or flame bulbs, some with a cup-like filtration region and fine cilia-like internal hairs forming a tuft. The structure appears threadlike and fragile, with a narrow lumen and an internal anatomical appearance; in some views a small exterior pore is visible along the duct.

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