1 / 13

Phylum Echinodermata: Sand Dollars, Starfish, Sea Urchins

Phylum Echinodermata: Sand Dollars, Starfish, Sea Urchins. MacKenzie Meggers. Key Characteristics . Endoskeleton Five-part r adial symmetry Water-vascular system Coelomic circulation and respiration Protostomes (first opening is mouth). Anatomy. Sieve (water enters) Ring Canal

tan
Download Presentation

Phylum Echinodermata: Sand Dollars, Starfish, Sea Urchins

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Phylum Echinodermata:Sand Dollars, Starfish, Sea Urchins MacKenzie Meggers

  2. Key Characteristics • Endoskeleton • Five-part radial symmetry • Water-vascular system • Coelomic circulation and respiration • Protostomes (first opening is mouth)

  3. Anatomy • Sieve (water enters) • Ring Canal • Tube feet • Anus • Stomach • Digestive Glands • Skin Gills • Reproductive Glands

  4. Digestion • Two stomachs • Digestive glands in each arm • Enzymes absorb nutrients • External Port- upper body

  5. Respiration • Skin Gills • Respiratory Gases • Tube feet • Oxygen from water is distributed through the body

  6. Internal Transport • Simple Circulatory system • Water vascular system

  7. Excretion • No distinct organs • Released through tube feet • Phagocytic cells & coelomocytes remove waste

  8. Response • Nervous system • Brain • Central nerve ring • Sensitive to touch, light, temperature, water conditions

  9. Movement • Water-Vascular System • Tube Feet • Crawl across the sea floor

  10. Reproduction • Separate sexes • External fertilization • Larvae settle on ocean floor • Gonads release gametes • Asexually or sexually

  11. Examples • 1. Sea Urchins 2. Sea Cucumber 3. Sand Dollars

  12. Facts • 7,000 living species, 13,000 extinct species • Largest phylum w/o freshwater • Found in all oceans • Mostly a marine group • Can live up to 10 years

  13. Literature Cited • "Animal Diversity Web." ADW: Echinodermata: INFORMATION. National Science Foundation, 2005. Web. 20 Feb. 2013. • Raven, Peter H., and George B. Johnson. Biology. Boston: McGraw-Hill, 2002. Print • "Digestive System of the Starfish." Holly Thurgood, n.d. Web. • ‘Starfish." Wikipedia. Wikimedia Foundation, 14 Mar. 2013. Web. 17 Mar. 2013. • "Starfish Digestion and Circulation." Starfish Digestion and Circulation. N.p., 10 May 2000. Web. 17 Mar. 2013. • "Echinodermata." N.p., n.d. Web. 17 Mar. 2013. • "Starfish (Sea Stars)." About.com Marine Life. Jennifer Kennedy, n.d. Web. 17 Mar. 2013.

More Related