Cnidaria don't have gills or lungs, but they take in oxygen from surrounding water through 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 sponges and the gaseous state share the characteristic of having a high degree of flexibility and adaptability. Sponges can change shape and volume to accommodate their environment, much like gases expand to fill the space available to them. Additionally, both can hold large amounts of water (in the case of sponges) or occupy significant volumes (in the case of gases) while maintaining a relatively low density. Finally, both are capable of allowing the flow of materials through their structure, facilitating the movement of nutrients and gases.
Both have parasitic species.
both
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.
Oxygen and carbon dioxide are both gases that play important roles in the process of respiration. Oxygen is needed for cells to produce energy, while carbon dioxide is a waste product of this process that needs to be removed from the body. Both gases are exchanged in the lungs during breathing.
Both are soft
Yes. Both are phyla.
They are both pores
Both humans and sponges are made of millions of cells, both need oxygen to survive, both need water and both produce waste products.