EchinodermsEchinoderms

EchinoEchino means “spiny” means “spiny”DermisDermis means “skin” means “skin”

By Nate By Nate WasdenWasden

What Is It…?What Is It…?

• Echinoderm: a classification of Echinoderm: a classification of marine animalsmarine animals

Echinoderms come in all sorts of various shapes and sizes.

CharacteristiCharacteristicscs-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

CharacteristiCharacteristicscs

-Water Vascular Systemfulfills many crucial bodily functions (respiration, circulation, movement,

etc.)

-Five-Part Radial Symmetrybody parts mostly come in multiples of

five

Water Vascular Water Vascular SystemSystem

• It is filled with fluids.It is filled with fluids.

• It opens to the outside of the It opens to the outside of the echinoderm through its echinoderm through its “madreporite.”“madreporite.”

• ““Tube feet” are attached to each Tube feet” are attached to each radial canal.radial canal.

Echinoderms feature a unique system of internal tubes that assist the animal.

FactsFacts•1. Respiration and circulation 1. Respiration and circulation

both are performed in the Water both are performed in the Water Vascular SystemVascular System

•2. Echinoderms have no head; 2. Echinoderms have no head; they, therefore, lack a developed they, therefore, lack a developed nervous systemnervous system

FactsFacts•3. Echinoderms have sensory 3. Echinoderms have sensory

cells that can detect light, cells that can detect light, gravity, and chemicalsgravity, and chemicals

•4. There are over seven 4. There are over seven thousand species of echinodermsthousand species of echinoderms

• -sea urchins--sand dollars--brittle star--sea cucumbers--sea stars--sea -sea urchins--sand dollars--brittle star--sea cucumbers--sea stars--sea stars--sea lilies--feather stars--and morestars--sea lilies--feather stars--and more

Works CitedWorks Cited• 1. Miller, Kenneth R., and Joseph S. Levine. 1. Miller, Kenneth R., and Joseph S. Levine. Prentice Hall BiologyPrentice Hall Biology. .

Upper Saddle River, N.J.: Prentice Hall, 2002. Print. Upper Saddle River, N.J.: Prentice Hall, 2002. Print.

•   2. Photograph. Web. 2. Photograph. Web. <http://www.cyhaus.com/marine/echinoderms/STARFISH1.jpg>.<http://www.cyhaus.com/marine/echinoderms/STARFISH1.jpg>.

• 3. Photograph. Web. 3. Photograph. Web. Http://kentsimmons.uwinnipeg.ca/16cm05/1116/33-37-Http://kentsimmons.uwinnipeg.ca/16cm05/1116/33-37-EchinodermsCollage.jpgEchinodermsCollage.jpg. .

• 4. “Sand Dollar.” Web. 25 Mar. 2010.4. “Sand Dollar.” Web. 25 Mar. 2010.

• 5. “The Starfish Sea-urchins and allies (Phylum Echinodermata).” 5. “The Starfish Sea-urchins and allies (Phylum Echinodermata).” The Earth Life Web. Web. 25The Earth Life Web. Web. 25