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Cnidaria don't have gills or lungs, but they take in oxygen from surrounding water through diffusion.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoDirect diffusion
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How do sponges and cnidarians obtain food and what do they eat?
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 .
What are the main characteristics of sponges cnidarians and worms?
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.
Is hydra freshwater or marine cnidarians?
both
How are cnidarians alike?
Both have parasitic species.
A cavity that serves both digestive and circulatory purpose in some cnidarians?
A cavity that both digestive and circulatory serve are called cylindrical. This is the purpose of cnidarians.
What are four characteristics shared by sponges and humans?
Both humans and sponges are made of millions of cells, both need oxygen to survive, both need water and both produce waste products.
What four characteristics are shared by both sponges and human?
Both humans and sponges are made of millions of cells, both need oxygen to survive, both need water and both produce waste products.
How is sponges and starfish alike?
Both are soft
Are cnidarians and roundworms two groups of animals?
Yes. Both are phyla.
What do sponges and sea anomones have in common?
They are both pores
What have sponges cnidarians mollusks and echinoderms have in common?
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
What is involved in both the feeding and the sexual reproduction in sponges?
Filtration
