1. By Kyler, Jeffrey and Ayden
Echinoderms
By Kyler, Jeffrey and Ayden

2. Description
a marine invertebrate of the phylum Echinodermata, such as a starfish, sea urchin, or sea cucumber.

3. Symmetry of Echinoderms
Evolved from bilateral symmetry
Larvae look like embryonic chordates
In adulthood, possess pentalateral symmetry (five sided)

4. Method of Feeding
Heterotrophs
Possess several methods
May be carnivorous or herbivorous

5. Circulation Open circulatory system Network of fluid filled canals
Tube feet

6. Response
Cellular response and a humoral one.
Fixes problems

7. Excretion
Uses its Water Vascular System to flush out any waste substances
They have no organs for direct excretion

8. Movement Have many tube feet on each of their “arms”
Expanding and contracting certain chambers in the water system
Moves water into certain feet which makes it move

9. Respiration Exchanges carbon dioxide for oxygen
Tube is surface for respiration

10. Classes and Examples Divided into five extant classes
animal
Asteroidea (starfish)
Ophiuroidea (brittle stars)
Echinoidea (sea urchin and sand dollars)
Crinoidea (sea lilies or feather stars)
Holothuroidea (sea cucumbers)