help with sponges, cnidarians, mollusks, and echinoderms!!!

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mebcooch2
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help with sponges, cnidarians, mollusks, and echinoderms!!!

Post by mebcooch2 » Fri Mar 16, 2007 12:53 am

what type of nervous system does a sponge have?

how do cnidarians carry out respiration?
and what type of circulatory sytem do they have (closed, open, diffusion, etc.)?

do mollusks have an open circulatory system?

and finally...
how do echinoderms reproduce and what type of circulatory system do they have??


thanks so much for any help you can give me!!
=]

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Dr.Stein
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Post by Dr.Stein » Fri Mar 16, 2007 2:13 am

You can find the answer in your Animal Physiology textbook. I am pretty sure it is there, because I am currently writing a lecture note for it, and some references, books and internet, provide a lot of info about it. You just need couple minutes to do that ;)
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Volvox
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Post by Volvox » Fri Mar 16, 2007 8:12 pm

Please try to answer these first. I will be more than happy to tell you if your answers are correct. I just got done teaching my students a zoology unit and am writing their practical.

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nugget
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Post by nugget » Sat Mar 17, 2007 8:19 am

i know these answers but the pros above are right :S u should really find out , research is one of the keys to being a good scientist ;)
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February Beetle
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Post by February Beetle » Tue Mar 20, 2007 3:32 am

It's in General Zoo textbooks, also :)
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