Ss Pwrpnt
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The Sea Star Precious Khalani Gooden Cosette Standrige- Folsom Ava Marshall Bambico Bio 1000 Images.google.com
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Transcript of Ss Pwrpnt
The Sea Star
Precious Khalani Gooden
Cosette Standrige-Folsom
Ava Marshall Bambico
Bio 1000
Images.google.com
OverviewStructure Appearance Vascular SystemDistribution and
habitatPhylogeny ReproductionFood Consumption
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StructureRadial symmetryTube feet with suction padsTube feet are controlled by
the Vascular SystemDoes not have heart, brain,
or eyes.Mouth and Anus in close
proximity
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Internal Structure
AppearanceUpper surface
colorful, while bottom is light colored.
Minute pincer structures
Majority have 5 arms, but there are some exceptions
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Appearancehttp://www.mvshibumi.com/photopage/Sea%20Star.JPG
The Vascular SystemSupplies water to the
ambulacra feet (tube feet)
Water withdrawn from the canals make suction effect
Water returned the suction is released.
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Distribution and Habitat
-All of Earth’s oceansPacific AtlanticIndian Antarctic
regions
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Distribution and HabitatRange:
Tropical coral reefs and kelp forests to the deep-sea floor
Most are sea-floor dwellers
Some live among the sandy sea shore
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Distribution and HabitatThey live in:
SandMudSea grass beds
They live on:Coral reefs Rocky underwater
cliffsThey live under:
Rock rubble
http://www.youtube.com/watch?v=1oMVFnwej4Q
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PhylogenyPhylum
Echinodermata:Roots from
ancestral flagellates
Most closely related to Phylum Chordata
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PhylogenyPhylum
EchinodermataClasses
Asteroidea-sea stars Ophiuroidea-brittle
stars Echinoidea-sea urchins,
sand dollars Crinoidea-sea lilies,
feather stars Holothuroidia-sea
cucumbers Concentricycloidea-sea
daisies
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PhylogenyPhylogeny of
Echinoderms with more detail…
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PhylogenyClass Asteroidea further breaks down into…
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Sexual ReproductionIndividuals either male or femalesexual reproduction
Fertilization occurs externally producing larvaOver 2 million eggs but few surviveLarva have bands of cilia used in swimming
and feeding.left side becomes the oral surface which faces
down, and the right side becomes the aboral surface, which faces up.
Sexual Reproduction
Asexual ReproductionAsexual
reproductionFission: the division
of the bodyThe reproduction of
missing body parts many sea stars can
regenerate a lost portion only if some part of the central disk is present.
A complete new animal can grow from a small fragment like an arm
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Food ConsumptionExtend or contract its tube
feetOral surface/mouth: center
of the underside of the disc Anus: upper side of the
body Preys on:
worms, Crustaceans bivalves.
Their tube feet pull a bivalve apart.
They extend their stomach out through their mouths
Digestive juices and cilia help digestion
http://www.youtube.com/watch?v=A100m5EpfFI
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Videoshttp://www.youtube.
com/watch?v=X49vVCwbAyU
Video: Sea star locomotion
http://www.youtube.com/watch?v=2AN1UIn7KPE
Video: Unknown starfish of Sulawesi
Bibliography Campbell, Neil A., and Jane B. Reece. Biology (8th Edition). San
Francisco: Benjamin Cummings, 2007. Print. Knott, Emily. 2004. Asteroidea. Sea stars and starfishes. Version
07 October 2004. http://tolweb.org/Asteroidea/19238/2004.10.07 in The Tree of Life Web Project, http://tolweb.org/
"Sea Stars: Asteroidea - Physical Characteristics, Behavior And Reproduction, Sea Stars And People, Sand Star (astropecten Irregularis): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET, CONSERVATION STATUS." Animal Life Resource. Web. 10 Nov. 2009. <http://animals.jrank.org/pages/1607/Sea-Stars-Asteroidea.html>.
Wray, Gregory A. 1999. Echinodermata. Spiny-skinned animals: sea urchins, starfish, and their allies. Version 14 December 1999 (under construction). http://tolweb.org/Echinodermata/2497/1999.12.14 in The Tree of Life Web Project, http://tolweb.org/H, Mark. "Marine Life Series: How Sea Stars Eat." Daily Kos SEIU.org , Apr. 2007. Web. 3 Nov. 2009 <http://www.dailykos.com/story/2007/4/27/211713/929>.
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