Ss Pwrpnt


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Ss Pwrpnt

  1. 1. The Sea Star<br />Precious Khalani Gooden<br />Cosette Standrige-Folsom<br />Ava Marshall Bambico<br />Bio 1000<br /><br />
  2. 2. Overview<br />Structure<br /> Appearance <br />Vascular System<br />Distribution and habitat<br />Phylogeny <br />Reproduction<br />Food Consumption<br /><br />
  3. 3. Structure<br />Radial symmetry<br />Tube feet with suction pads<br />Tube feet are controlled by the Vascular System<br />Does not have heart, brain, or eyes.<br />Mouth and Anus in close proximity<br /><br />
  4. 4. Internal Structure<br />
  5. 5. Appearance<br />Upper surface colorful, while bottom is light colored.<br />Minute pincer structures<br />Majority have 5 arms, but there are some exceptions<br /><br />
  6. 6. Appearance<br /><br />
  7. 7. The Vascular System<br />Supplies water to the ambulacra feet (tube feet)<br />Water withdrawn from the canals make suction effect<br />Water returned the suction is released.<br /><br />
  8. 8. Distribution and Habitat<br />-All of Earth’s oceans<br />Pacific<br /> Atlantic<br />Indian <br />Antarctic regions<br /><br /><br />
  9. 9. Distribution and Habitat<br />Range:<br />Tropical coral reefs and kelp forests to the deep-sea floor<br />Most are sea-floor dwellers<br />Some live among the sandy sea shore<br /><br /><br /><br />
  10. 10. Distribution and Habitat<br />They live in:<br />Sand<br />Mud<br />Sea grass beds <br />They live on:<br />Coral reefs <br />Rocky underwater cliffs<br />They live under:<br />Rock rubble<br /><br /><br /><br /><br /><br />
  11. 11. Phylogeny<br />Phylum Echinodermata:<br />Roots from ancestral flagellates<br />Most closely related to Phylum Chordata<br /><br />
  12. 12. Phylogeny<br />Phylum Echinodermata<br />Classes<br />Asteroidea-sea stars<br />Ophiuroidea-brittle stars<br />Echinoidea-sea urchins, sand dollars<br />Crinoidea-sea lilies, feather stars<br />Holothuroidia-sea cucumbers<br />Concentricycloidea-sea daisies<br /><br />
  13. 13. Phylogeny<br />Phylogeny of Echinoderms with more detail…<br /><br />
  14. 14. Phylogeny<br />Class Asteroidea further breaks down into…<br /><br />
  15. 15. Sexual Reproduction<br />Individuals either male or female<br />sexual reproduction<br />Fertilization occurs externally producing larva<br />Over 2 million eggs but few survive<br />Larva have bands of cilia used in swimming and feeding.<br />left side becomes the oral surface which faces down, and the right side becomes the aboral surface, which faces up. <br />
  16. 16. Sexual Reproduction<br />
  17. 17. Asexual Reproduction<br />Asexual reproduction<br />Fission: the division of the body<br />The reproduction of missing body parts<br />many sea stars can regenerate a lost portion only if some part of the central disk is present. <br />
  18. 18. A complete new animal can grow from a small fragment like an arm<br /><br />
  19. 19. Food Consumption<br />Extend or contract its tube feet<br />Oral surface/mouth: center of the underside of the disc <br />Anus: upper side of the body <br />Preys on:<br />worms, <br />Crustaceans<br /> bivalves. <br />Their tube feet pull a bivalve apart. <br />They extend their stomach out through their mouths<br />Digestive juices and cilia help digestion<br /><br /><br />
  20. 20. Extruding stomach<br /><br />
  21. 21. Videos<br /><br />Video: Sea star locomotion<br /><br />Video: Unknown starfish of Sulawesi<br />
  22. 22. Bibliography<br />Campbell, Neil A., and Jane B. Reece. Biology (8th Edition). San Francisco: Benjamin Cummings, 2007. Print.<br />Knott, Emily. 2004. Asteroidea. Sea stars and starfishes. Version 07 October 2004. in The Tree of Life Web Project,<br />&quot;Sea Stars: Asteroidea - Physical Characteristics, Behavior And Reproduction, Sea Stars And People, Sand Star (astropecten Irregularis): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET, CONSERVATION STATUS.&quot; Animal Life Resource. Web. 10 Nov. 2009. &lt;;.<br />Wray, Gregory A. 1999. Echinodermata. Spiny-skinned animals: sea urchins, starfish, and their allies. Version 14 December 1999 (under construction). in The Tree of Life Web Project,, Mark. &quot;Marine Life Series: How Sea Stars Eat.&quot; Daily Kos , Apr. 2007. Web. 3 Nov. 2009 &lt;;. <br /><br />