Phylum Porifera Flashcards
Sponges lack
- True tissues
- Nerves
- Muscles
What is the level of organization for sponges?
Cellular
Sponges are found mostly in
Marine environments
What does water allow for?
- Feeding
- Exchange of gases
- Excretion
Sponges have Ostia, or pores, which allow for
Water to move through the body
Which systems do sponges lack?
- Digestive
- Nervous
- Circulatory
Sponges have a canal system which allows for the transport of water and
Digestion, excretion, and exchange of gases
Sponges have a spongecoel which functions to
Draw water in
How is the symmetry in sponges?
None, making them asymmetrical
How many tissue layers do sponges have?
Two, making them diploblasts
Water flows out via the
Osculum with the help of choanocytes
What are choanocytes?
Cells which allow for flow of water through pores, into the spongocoel and then out the osculum
What strengthens the endoskeleton of sponges?
Spicules
Spicules are made of
Silica or calcium carbonate
