Nate Wasden Mr. Collins Biology Period 4

1. Echinoderms
Echino means “spiny”
Dermis means “skin”
By Nate Wasden

2. What Is It…?
• Echinoderm: a classification of marine
animals
Echinoderms come in all sorts of
various shapes and sizes.

3. Characteristics
-Two-sided body
the side in which the mouth is located is
referred to as the “oral surface”
the opposite site is called the “aboral
surface”
-Endoskeleton: an internal skeleton formed by
hardened plates of calcium carbonate

4. Characteristics
-Water Vascular System
fulfills many crucial bodily functions
(respiration, circulation, movement, etc.)
-Five-Part Radial Symmetry
body parts mostly come in multiples of five

5. Water Vascular System
Echinoderms feature a unique system of internal
tubes that assist the animal.
• It is filled with fluids.
• It opens to the outside of the echinoderm
through its “madreporite.”
• “Tube feet” are attached to each radial
canal.

6. Facts
• 1. Respiration and circulation both
are performed in the Water Vascular
System
• 2. Echinoderms have no head; they,
therefore, lack a developed nervous
system

7. Facts
• 3. Echinoderms have sensory cells
that can detect light, gravity, and
chemicals
• 4. There are over seven thousand
species of echinoderms
• -sea urchins--sand dollars--brittle star--sea cucumbers--sea stars--sea stars--sea
lilies--feather stars--and more

8. Works Cited
• 1. Miller, Kenneth R., and Joseph S. Levine. Prentice Hall Biology. Upper
Saddle River, N.J.: Prentice Hall, 2002. Print.
• 2. Photograph. Web.
<http://www.cyhaus.com/marine/echinoderms/STARFISH1.jpg>.
• 3. Photograph. Web. Http://kentsimmons.uwinnipeg.ca/16cm05/1116/33-
37-EchinodermsCollage.jpg.
• 4. “Sand Dollar.” Web. 25 Mar. 2010.
• 5. “The Starfish Sea-urchins and allies (Phylum Echinodermata).” The Earth
Life Web. Web. 25