| The whole layer of nephridial cytoplasm surrounding the radiating canals is 1 to 1.5 micron thick. |
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| Nemerteans possess protonephridia consisting of multiciliated terminal cells, a ciliated nephridial duct and a nephridiopore opening at the epidermis. |
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| Sensory and neurosecretory innervation of the nephridia is thus accomplished by a single neuron, which is thought to modulate nephridial performance. |
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| Moreover, the occurrence of nephridial pores was likewise incorrectly stated. |
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| El-Duweini AK, Ghabbour SI Nephridial systems and water balance of three Oligochaeta genera. |
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