Question

Canal system is present in
(i) Coelentrata
(ii) Porifera
(iii) Echinodermata
(iv) Paramoecium​

Answer 1

Answer:

$\red\dagger$ Canal system is present in Phylum Porifera.

Phylum Porifera

• Phylum porifera is commonly called sponges.

• Study of sponges is called Parazoology.

• It is mostly marine organisms.

• The body is made of spongin fibres.

• They have both sexual and asexual modes of reproduction.

• They posses  remarkable regeneration power.

• Have internal fertilization and have indirect development.

• They don't have sense organs or nervous system.

• One of the most distinct feature of porifera is the presence of a water canal system.

• The canal system helps in gathering food , respiration and even excretion in sponges.

• Examples includes Sycon , Spongilla , Euspongia , etc.