An excretory system, such as the flame bulb system of flatworms, consisting of a network of tubules lacking internal openings.

Protonephridia Excretory System Flame Bulb Flatworms Consisting Network

Protonephridia form an excretory system, like the flame bulb system in flatworms, comprising tubules without internal openings.

I protonefridi sono un sistema escretore, come il sistema a bulbo di fiamma dei platelminti, costituito da una rete di tubuli senza aperture interne.

Front	protonephridia
Back	An excretory system, such as the flame bulb system of flatworms, consisting of a network of tubules lacking internal openings.

Tags: ch.44

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