Cnidaria don't have gills or lungs, but they take in oxygen from surrounding water through diffusion.
Direct diffusion
Cnidarians have strings to get their food also to get protection they are also divided in three groups what they also have that sponges dont is string cells and they have a simple nervous system . On the other hand,Sponges have No symmetry they never move and have no organs . Thanks for using my answers to help you with your science work .
Sponges are invertebrate animals that usually have no body symmetry and never have tissues or organs. Cnidarians use stinging cells to capture food and defend themselves. Flatworms are flat and as soft as jelly. Unlike cnidarians or flatworms, roundworms have a digestive system that is like a tube, open at both ends. Earthworms and other segmented worms have bodies made up of many linked sections called segments.
both
Both have parasitic species.
A cavity that both digestive and circulatory serve are called cylindrical. This is the purpose of cnidarians.
Both humans and sponges are made of millions of cells, both need oxygen to survive, both need water and both produce waste products.
Both humans and sponges are made of millions of cells, both need oxygen to survive, both need water and both produce waste products.
Both are soft
Yes. Both are phyla.
They are both pores
Well they both produce by budding like a flower would do and they both have the ability to move but choose to spend most of their time in one place. that is all i know and i am doing a project on that.. i am goin to get a bad grade
Filtration