Animal KingdomHard
Question
The canal system is a characteritic feature of
Options
A.echinoderms
B.helminthes
C.coelenterates
D.sponges
Solution
Sponges possess an extensive system of interconnected cavities called canal system which typically consists of incurrent canals, redial canals, excurrent canals and spongocoel. The system is useful for nutrition, respiration and excretion.
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