Echinoderms


 * Echinoderms**

__Digestive system- they have a complete digestive system, with an anus as a mouth__ __Nervous system-__ __Body plan- tnedhhhhhhhhhhdhsuyjmyr xmcgryjm vybrjmyrvjm__ __Picture-__ __Positive impact on humans__ __Negative impact on humans__ __1 interesting fact echinoderm means "spiny skin"__