SSC MTS EXAM

Detailed explanation-1: -Sponges are a living example of an organism having a canal system. There are pores and canals arranged in a complex manner on the body of the porifera or sponge.

Detailed explanation-2: -In Spongilla, the larva is different from the parenchymula and is called as ‘rhagon larva’. It has rhagon type of canal system and thus, it is called as rhagonoid canal system.

Detailed explanation-3: -The canal system helps the sponges in nutrition, respiration, excretion and reproduction. The current of water which flows through the canal system brings the food and oxygen and takes away the carbon dioxide, nitrogenous wastes and faeces. It carries the sperms from one sponge to another for fertilization of the ova.