Describe the route of water through a sponge.
A. enters through the spongocoel into the osculum and exits via pores.
B. enters through the pores into the osculum and exits via the spongocoel.
C. enters through the osculum into the mesohyl and exits via the spongocoel.
D. enters through pores into the spongocoel and exits via the osculum.
E. enters through the osculum into the spongocoel and exits via pores.
Answer: D
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