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Ss Pwrpnt Ss Pwrpnt Presentation Transcript

  • The Sea Star
    Precious Khalani Gooden
    Cosette Standrige-Folsom
    Ava Marshall Bambico
    Bio 1000
    Images.google.com
  • Overview
    Structure
    Appearance
    Vascular System
    Distribution and habitat
    Phylogeny
    Reproduction
    Food Consumption
    Google.com
  • Structure
    Radial symmetry
    Tube feet with suction pads
    Tube feet are controlled by the Vascular System
    Does not have heart, brain, or eyes.
    Mouth and Anus in close proximity
    Google.com
  • Internal Structure
  • Appearance
    Upper surface colorful, while bottom is light colored.
    Minute pincer structures
    Majority have 5 arms, but there are some exceptions
    Images.google.com
  • Appearance
    http://www.mvshibumi.com/photopage/Sea%20Star.JPG
  • 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    Water withdrawn from the canals make suction effect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
    Phylum Echinodermata
    Classes
    Asteroidea-sea stars
    Ophiuroidea-brittle stars
    Echinoidea-sea urchins, sand dollars
    Crinoidea-sea lilies, feather stars
    Holothuroidia-sea cucumbers
    Concentricycloidea-sea daisies
    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.
  • Sexual Reproduction
  • 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