I think you're reading out of a low-level-zoology book, there's actually 14 characteristics. But some of them are really hard to understand, i cant even understand some of them myshelf, but for some that i can understand, I'll type it in
1. Body unsegmented, radial
2.No head, no brain
3.It has a water-vascular system
4.Excretory organs abset( it cant pee)
5.And they can regenerate lost parts.
The other 9 are really hard to understand, i think you wouldn't really understand them
Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called a water vascular system. There are four major groups of echinoderms: sea stars, brittle stars, sea urchins, and sea cucumbers.
they are in the shape of a star
their body plan
Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called water vascular system.
the 8 groups of invertebrates are the arthropods, poriferans, platyheminthes, coelenterates, nematoeds, mollusks, echinoderms, and annelids
The main function of the ambulacral system in echinoderms is to facilitate movement, respiration, and feeding. It consists of a series of fluid-filled tube feet that help echinoderms to crawl, capture food, and exchange gases with the surrounding environment.
Echinoderms are in the Animalia kingdom.
The scientific name for Echinoderms is Echinodermata.
Echinoderms can only be found in water, as they are aquatic. Some characteristics of Echinoderms are: Hard Skin, have arms or spines, have 5 body parts, organs found towards centre of body. Examples: Star Fish, Sea Cucumber, Sea Urchin
Echinoderms belong to the phylum Echinodermata.
As of yet, there is no known species of parasitic echinoderms.
Yes Eventually echinoderms do live in water.