The Vascular System Supplies water to the ambulacra feet (tube feet) Water withdrawn from the canals make suction effect Water returned the suction is released. Images.google.com
Distribution and Habitat -All of Earth’s oceans Pacific Atlantic Indian Antarctic regions Google.com Google.com
Distribution and Habitat Range: Tropical coral reefs and kelp forests to the deep-sea floor Most are sea-floor dwellers Some live among the sandy sea shore Google.com Google.com Google.com
Distribution and Habitat They live in: Sand Mud Sea grass beds They live on: Coral reefs Rocky underwater cliffs They live under: Rock rubble Google.com Google.com Google.com http://www.youtube.com/watch?v=1oMVFnwej4Q Google.com
Phylogeny Phylum Echinodermata: Roots from ancestral flagellates Most closely related to Phylum Chordata Google.com
Phylogeny Phylogeny of Echinoderms with more detail… Google.com
Phylogeny Class Asteroidea further breaks down into… Google.com
Sexual Reproduction Individuals either male or female sexual reproduction Fertilization occurs externally producing larva Over 2 million eggs but few survive Larva 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.
Asexual Reproduction Asexual reproduction Fission: the division of the body The 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 Images.google.com
Food Consumption Extend or contract its tube feet Oral 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 Images.google.com http://www.youtube.com/watch?v=A100m5EpfFI
Extruding stomach www.dailykos.com
Videos http://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>. Google.com