Porifera
Important Information:
Glass Sponges(Hexactinellida): Hexactinellid sponges are sponges with a skeletal system of four and or six pointed siliceous spicules.
Glass sponges are considered deep sea sponges. These sponges are made houses my shrimp. Through all of this these deep sea sponges do not have a nervous system.
Cellular Sponges(Porfera): The calcareous sponges are classified by the spicules made out of calcium carbonate in the form of aragonite.
These sponges can react to various actions by closing the ostia or oscula. This is due to direct physical stimulation or particles within the sponge are to enlarged or are highly concentrated. These sponges do not have nerve cells either. Through this they still have the ability to respond to electrical impulses.
Demospongiae: Most sponges belong to this class. They have a skeletal system made up of silicon containing spicules. They vary in size, either large or small.
It has no nervous system. It does not have a brain or nerve cells either. Rather they heavily rely on water for many functions. They have minimal reactions, the only real reaction they have is toward small animals on the bottom of the ocean floor.
- The Phylum Porifera consists of sponges which have bodies full of pores and channels allowing water to circulate through them.
- These multicellular organisms technically have no organs, muscles, digestive systems or brains.
- There are over 5,000 different species of Porifera.
- They are considered a plant-animal because in their adult life they cannot move freely, they are sessile.
Glass Sponges(Hexactinellida): Hexactinellid sponges are sponges with a skeletal system of four and or six pointed siliceous spicules.
Glass sponges are considered deep sea sponges. These sponges are made houses my shrimp. Through all of this these deep sea sponges do not have a nervous system.
Cellular Sponges(Porfera): The calcareous sponges are classified by the spicules made out of calcium carbonate in the form of aragonite.
These sponges can react to various actions by closing the ostia or oscula. This is due to direct physical stimulation or particles within the sponge are to enlarged or are highly concentrated. These sponges do not have nerve cells either. Through this they still have the ability to respond to electrical impulses.
Demospongiae: Most sponges belong to this class. They have a skeletal system made up of silicon containing spicules. They vary in size, either large or small.
It has no nervous system. It does not have a brain or nerve cells either. Rather they heavily rely on water for many functions. They have minimal reactions, the only real reaction they have is toward small animals on the bottom of the ocean floor.