1. Phylum Echinodermata

2. General Characteristics
Coelomates
Radial symmetry – 5 part
Ability to regenerate
Endoskeleton

3. Feeding & Respiration Feeding method: Respiration:
Variety of feeding methods
Respiration:
Gills & water vascular system

4. Circulation & Excretion
Water vascular system
Excretion:
Feces released through anus
Ammonia passed through thin walled tissues of tube feet or gills

5. Response
Nerve ring that surrounds mouth connected to radial nerves in each arm
Detect light, gravity, chemicals

6. Movement & Reproduction
Water vascular system – tube feet
Reproduction:
Sexual – external fertilization - dioecious

7. Habitat & Ecology Habitat: Ecology: All marine
Help control algae, clam, and coral population
Sea star feeds exclusively on coral  destroy coral reefs

8. Structures Madreporite– sieve like structure through which the water
vascular system of an echinoderm opens to the
outside
Endoskeleton – structural support located inside the body of an
animal
Tube foot – suction-cuplike structure attached to radial canals;
used to walk & open shells
Water vascular system – system of internal tubes that carries our essential
functions such as feeding, respiration, circulation,
and movement
Eyespot
Endoskeletal plates
Anus
Stomach
Digestive glands
Ring canal
Radial canal
Madreporite
Reproductive glands
Tube foot
Sucker

9. Comparing Groups and Major Characteristics of Echinoderms
Feeding
Shape
Movement
Sea urchins and sand dollars
Detritivores
Disc- or globe-shaped, no arms
Burrow in sandy ocean bottom or wedge in rock crevices using moveable spines attached to endoskeleton
Characteristic
Brittle stars
Sea cucumbers
Sea stars
Sea lilies and feather stars
Star-shaped, arms
Move rapidly along ocean floor using arms
Cucumber-shaped, no arms
Move slowly along ocean floor using muscular body wall to crawl
Most carnivores
Creep slowly along ocean floor using arms
Herbivores
Stalk with feathery arms
Cannot move; attached to ocean bottom