Which phylum is characterized by the presence | vedclass

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(C) The phylum $Porifera$ (sponges) is characterized by a unique water transport or canal system. Water enters through minute pores called $ostia$ in

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Porifera

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(C) The phylum $Porifera$ (sponges) is characterized by a unique water transport or canal system. Water enters through minute pores called $ostia$ in the body wall into a central cavity,the $spongocoel$,and goes out through the $osculum$. This pathway of water transport is helpful in food gathering,respiratory exchange,and removal of waste. Therefore,the presence of a $spongocoel$ is a diagnostic feature of the phylum $Porifera$.

Which phylum is characterized by the presence of a central cavity known as the spongocoel?

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