|Class 9 Biology Diversity In Living Organisms||Porifera|
The organisms belonging to this group have holes.
The animals of this group are non- motile and are attached to some rigid support.
The organisms belonging to this group have pores throughout their body.
They have a canal system circulates the water throughout the body of these organisms to transport the food and oxygen.
These organisms are covered with a hard external layer or skeleton.
Examples of animals belonging to this group are Euplectelea, Sycon, Spongilla.