Water enters the body of sponges through

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(D) Sponges are also known as $Porifera$,which means pore-bearing animals.Sponges have a perforated body with numerous small openings called $Ostia$.W

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Ostia

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(D) Sponges are also known as $Porifera$,which means pore-bearing animals.Sponges have a perforated body with numerous small openings called $Ostia$.Water enters the body of sponges through these $Ostia$.$A$ larger opening through which water flows out of the sponge is called the $Osculum$.Therefore,$Porifera$ have numerous mouth-like pores called $Ostia$ for the entry of water and a single large pore for the exit of water called the $Osculum$.

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