MadSci Network: Zoology

Re: How do Daphnia osmoregulate? Do they have a contractile vacuole?

Date: Thu Oct 21 14:08:48 1999
Posted By: Dave Williams, Science Department Chair, Valencia Community College
Area of science: Zoology
ID: 935520671.Zo

Daphnia do not have contractile vacuoles. Contractile vacuoles are pretty much limited to some protists and sponges. Daphnia, being crustaceans in the Phylum Arthropoda (Kingdom Animalia), have a complex, kidney-like organ built upon basic units called metanephridia. I did a simple search on "daphnia osmoregulation" and came up with the following URL which has some good, basic information on osmoregulation in animals in general.

Hope this has been useful.

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