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Echinodermata

Echinodermata. By: Tricia Ingersoll. Echinodermata: Habitat and food source. Food source Carnivores eat clams (starfish) Filter feeders filter plankton (sea cucumber) Marine environments Ranging from shallow waters to the deep sea. Echinodermata: Importance to humans and environment.

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Echinodermata

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  1. Echinodermata By: Tricia Ingersoll

  2. Echinodermata: Habitat and food source. • Food source • Carnivores eat clams (starfish) • Filter feeders filter plankton (sea cucumber) • Marine environments • Ranging from shallow waters to the deep sea

  3. Echinodermata: Importance to humans and environment • Environment • Their skeletons contribute to the limestone formation; helps with geographic information. • Humans • Contribute to the overall knowledge of animal fertilization. • Fossils also used to decorate homes.

  4. Echinodermata: Unique features. • Echinoderm means: • “spiny skin” • Been around since the Cambrian period. • Regeneration • Regrows an arm or body part • Asexual reproduction

  5. Echinodermata: How do they support their shape? • How they get oxygen and release carbon • Through the water vascular system • Bumps or spines on surface take in oxygen some of them have gill structures. • Internal skeletons • Made of Calcareous plates known as ossicles. • Plates are crystals of calcium carbonate fused together.

  6. Echinodermata: Reproduction and life cycle. • Gonochoristic- having separate sexes. • Male and female discharge their eggs and sperm into water and that where the eggs are fertilized. • Develops into larva • Settles in seabeds then changes into a miniature adults (metamorphosis) • Click picture for more details.

  7. Radial nerve cord Each radii are equipped with radial nerve cords. Connected by a nerve that runs along the gut ( Esophageal nerve ring). Controls muscles, receives info such as touch, chemicals, and light. Echinodermata: Nervous system and sensory structure.

  8. The water vascular system and hemal system derived from coelom. (hemal-canal and spaces.) Fluid moved by muscular pumping. Echinodermata: Circulatory system.

  9. The waste is passes through the mouth in some echinoderms. Usually passes through the water vascular system. Diffuses across the body surfaces to the outside. Echinodermata: Excretory system and wastes.

  10. Echinodermata: Digestive system • Digestion occurs in the stomach and digestive ceca. • Tube feet • Pick up sand and detritus then placed in mouth. • Mouth on the bottom.

  11. Echinodermata: Examples of animals • Starfish • Brittle star • Sea cucumber • Sand dollar • Sea lillies

  12. Echinodermata: Type of symmetry • Radial symmetry- can be divided in halves at central point. • Adults stage • Bilateral symmetry- mirror like image. • Larva stage.

  13. Echinodermata: Water vascular system • Features • Contain sensory neurons located at the tube feet. • Function • Control of locomotion, respiratory, and feeding

  14. Click to see video

  15. Echinodermata: The classes of echinoderm. • Echinoidea “sea urchins” • Body plan: rigid endoskeleton with a covering of outward-pointing spines. • Spines include poisonous pedicellaria used against predators. • Echinoidea are herbivore or detritus feeders.

  16. Echinodermata: The classes of echinoderm • Holothuroidea “sea cucumber” • 900 species worldwide. • Detritivores (eat decaying material) • Usually green and bilateral symmetry and the skin is leathery. • Astroidea “starfish” • 1700 living species. • Movement involves hundred of tube feet. • They feed by forcing their stomachs out of their bodies to enter prey.

  17. Echinodermata: The classes of echinoderm • Crinodea “feather star” • Found in warm tropical seas. • Attach to corals and other surfaces. • Mouth and anus are both on top • Movement involves flapping of the arms. • Opsiuroidea “Brittle star” • Ophiuroid means “snake-like”. • Moves by using the arms in a rowing stroke. • They are detritus feeders.

  18. Work Cited • "Animals: Aquatic; Echinoderms; Sea Lilies, Star Fishes, Urchins, Sea Cucumbers." Echinoderm. 6 Apr. 2008 <http://www.photovault.com/Link/Animals/Aquatic/oEchinoderms/AAOVolume01.html>. • "Echinodermata." Animal Diversity Web. 2008. University of Michigan Museum of Zoology. 30 Mar. 2008 <http://animaldiversity.ummz.umich.edu/site/index.html>. • "Echinodermata." Larousse Encyclopedia. New York: Larousse & Co. Inc., 1969. • http://www.virted.org/Animals/Starfish.html (didn’t give any more information) • Miller, and Levine. Biology: the Living Science. Upper Saddle River: Prentice-Hall, Inc., 1998. 657-659. • Wray, Gregory A. "Echinodermata." The Tree of Life Web Project. Dec. 1999. 30 Mar. 2008 <http://www.tolweb.org/echinodermata>. • World of Animals: Insects and Others. Danbury: Scholastic Library, 2004. 89.

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