U.S. Fish and Wildlife Service
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Mussel anatomy: a typical mussel shell and its "soft" inner tissues and organs.
mussel anatomy (gif)
Source: Cummings, K.S. and C.A. Mayer. 1992. Field Guide to Freshwater Mussels of the Midwest. Manual 5. Illinois Natural History Survey, Champaign, IL. 194pp.
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Last updated on June 11, 2003
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