1. Echinoderms Echinoderms have spiny skin and an internal skeleton.
Sea stars, sea urchin's, sand dollars.
More than 7,000 species
Jessica Scrimsher and Nate

2. Symmetry 5 part radial symmetry
Radial symmetry is any number of imaginary planes drawn through the center.

3. The food that these guys eat is
Starfish feeding method they eat with their mouth that is on the bottom part of their body.
The sea urchins' hard plates at the bottom of their mouth is what helps them eat their prey
The sand dollar eats at the  bottom of the floor and has a mouth at the bottom of the of the body 
The food that these guys eat is

4. Circulation
Via Fluid in the coelom, a rudimentary system of vessels, and the water vascular system.
The water vascular system i s a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet.

5. Excretion
Digestive wastes released through anus; nitrogenous cellular wastes excreted as ammonia through tube feet and skin gills.

6. Response
Minimal nervous system nerve ring is connected to the body sections by radial nerves most have scattered sensory cells that detect light gravity, and chemicals secreted by prey. 

7. Movement
In most, tube feet work with endoskeleton to enable locomotion.
Tube feet are; large number of small flexible hollow appendages

8. Reproduction: External Fertilization
The starfishes reproduces by spawning
Sand dollars reproduce by releasing the eggs at the bottom of the sea floor.
The sea urchins release eggs and they get fertilized in the ground.
Reproduction: External Fertilization 

9. Respiration
Gas exchange is carried out by surfaces of tube feet, and, in many  species, by skin gills.

10. Names Of Classes and Examples Of Each
Crinoidea: Sea lily
Asteroidea: sea stars
Echinoidea: sea biscuit
Ophiuroidea: Brittle star
Holothuroidea: Sea cucumbers