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Canals and inland waterways | Description, History, Types, Features, Importance, & Examples | Britannica
B.Sc. Zoology Part I CANAL SYSTEM IN PHYLUM PORIFERA (SPONGES) 1. Asconoid Type:- Water from exterior incurrent pores spongocoel
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Canal system, Lowell National Historical Park, 2016. - PICRYL - Public Domain Media Search Engine Public Domain Search
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