What are the characteristics of phylum-porifera?
General features of phylum Porifera:
They are mostly marine and non-motile.
They are mostly found attached to rocks.
They show cellular level of organization. Their body is not organized into tissues and organs.
Their bodies are porous. Their body has holes or pores all over, which allows the circulation of water throughout the body and bring in food and oxygen.
1. exclusively marine , mostly aquatic.
2. cellular level of organisation
3.adults are sessile and young ones are free swimming.
4.water enters into the large body cavity through ostia and comes out through osculum. This is known as water canal system
5.Water canal system helps in food gathering, respiratory gases and removal of waste.
6.body is made up of spicules.
7.primitive and multicellular.
8. nutrition: holozoic and digestion:intracellular.
9.fertilization:internal and development: indirect