Help with biology question

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How are echinoderms different than sponges?

Please one or two sentences to answer! 

Aug 12th, 2015

Hello friend...Thank you for the opportunity to help you with your question :-)

Sponges belong to the phylum Porifera, which means 'pore bearing.' The have pores that are called incurrent vents, where water comes in, and excurrent vents, where water goes out. They are considered the most primitive of animals because they don't have any complex organs or tissues, so, for example, they don't have a circulatory system or a digestive system or a nervous system. Their cells are somewhat loosely structured in that some cells can move around from place to place in the sponge and there are some unspecialized cells that can become other kinds of cells. Also, they only have two layers of cells. There are some types of sponges that you can put through a sieve to separate all the cells but then the cells will go back together to recreate a sponge again. Echinoderms are a completely different and more advanced phylum. They have organ systems and fixed (non-changing) cell types and more layers of cells. Also, if you put an echinoderm through a sieve, he's a gonner.

Here is the complete answer! Please let me know if you need any clarification. Please best with a 5*. Thank you and Godbless!!!
Aug 12th, 2015

Please reread the post, I asked "Please one or two sentences to answer! "

Aug 12th, 2015

pardon me..let me rephrase it

Aug 12th, 2015

No problem, thanks

Aug 12th, 2015

Sponges belong to the phylum Porifera, which means 'pore bearing.' The have pores that are called incurrent vents, where water comes in, and excurrent vents, where water goes out whereas Echinoderms are a completely different and more advanced phylum. They have organ systems and fixed (non-changing) cell types and more layers of cells. Also, if you put an echinoderm through a sieve, he's a gonner.

Aug 12th, 2015

i hope it looks much better now?

Aug 12th, 2015

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