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Q.
Water enters the body of sponges through
Animal Kingdom
Solution:
Sponges are also called as porifera, means pore bearing animals. Sponges have perforated body with numerous opening called ostia. Through ostia water enters inside sponges.
A larger opening through which water flows out of sponge is called osculum. So porifera have enumerate mouth like pore called ostia for entry of water and single large pore for exit of water called osculum.