1. Parazoa no true tissues Eumetazoa Multicellularity RadiataBilateria

2. QUIZ (CHAMPACA) 1. True or False : Jellyfishes have no nervous system. 2. What are the 2 stages of the life cycle of jellyfishes ? 3. What is the term used to describe the two - tissue layer that Cnidarians possess ? 4. Give one class under this Phylum 5. Give ecological significance of Cnidarians.

3. Gr. “ nettle ” cnidocytes with nematocysts previously “ Coelenterata ” with the Ctenophora ( coel + enteron ) 10 000 sp. PHYLUM CNIDARIA STINGING ANIMALS http://farm4.static.flickr.com/3085/2832954307_dc57ebb1a6.jpghttp://farm4.static.flickr.com/3085/2832954307_dc57ebb1a6.jpg, http://news.nationalgeographic.com/news/2006/01/images/060119_jellyfish.jpg, http://www.seasky.org/wallpaper/assets/wallpaper_sea/anemones-1280.jpg, http://www.aquariumdomain.com/images/corals/closedBrainCoral1.jpghttp://news.nationalgeographic.com/news/2006/01/images/060119_jellyfish.jpg http://www.seasky.org/wallpaper/assets/wallpaper_sea/anemones-1280.jpg http://www.aquariumdomain.com/images/corals/closedBrainCoral1.jpg

4. FORM AND FUNCTION DIMORPHIC BODY PLAN radially - symmetric diploblastic 2- layered body wall ( epidermis + gastrodermis ) gelatinous mesoglea gastrovascular cavity ( GVC ) incomplete gut digestive sac with only one opening http://www.reefed.edu.au/__data/assets/image/0005 /17987/polypdiagram.gifhttp://www.reefed.edu.au/__data/assets/image/0005 /17987/polypdiagram.gif, http://3.bp.blogspot.com/- GHG4p2wPVPs/TenLrQE0cyI/AAAAAAAAA_s/YZiq _lfYItM/s1600/10a.JPG,http://3.bp.blogspot.com/- GHG4p2wPVPs/TenLrQE0cyI/AAAAAAAAA_s/YZiq _lfYItM/s1600/10a.JPG

5. FORM AND FUNCTION: FEEDING http://arayalacy.files.wordpress.com/2011/11/digesthydra2.jpghttp://arayalacy.files.wordpress.com/2011/11/digesthydra2.jpg, http://www.bio.miami.edu/dana/pix/cnidocyte.gifhttp://www.bio.miami.edu/dana/pix/cnidocyte.gif predatory extracellular digestion in GVC  intracellular within cells of gastrodermis circulation through diffusion

6. FORM AND FUNCTION: RESPONSE http://media-3.web.britannica.com/eb-media/35/73335-004-9E50A397.jpg

7. FORM AND FUNCTION: MOVEMENT Polyps : hydrostatic skeleton Contractile fibers ( not true muscle tissues ) + H 2 O in GVC Medusas : jet propulsion Fibers contract  medusa closes  H 2 O forced out  forward movement

8. FORM AND FUNCTION: REPRODUCTION ASEXUAL THROUGH BUDDING SEXUAL THROUGH SYNCHRONIZED RELEASE OF GAMETES

9. Phylum Cnidaria Hydrozoa conspicuous polyp stage Hydra Physalia Praya Anthozoa polyp stage only Sea anemone Coral animals Scyphozoa cup shaped medusa stage Aurelia Mastigia Cyanea Cubozoa umbrella shaped medusa stage Chironex http://www.aaskolnick.com/hydr a3.jpghttp://www.aaskolnick.com/hydr a3.jpg, http://www.walldesk.net/pdp/102 4/17/14/-Sea-Anemone.jpg, http://www1.american.edu/ted/i mages4/braw3.jpg, http://www.oceanwideimages.co m/images/2475/large/box- jellyfish-24M1211-16.jpg http://www.walldesk.net/pdp/102 4/17/14/-Sea-Anemone.jpg http://www1.american.edu/ted/i mages4/braw3.jpg http://www.oceanwideimages.co m/images/2475/large/box- jellyfish-24M1211-16.jpg

10. ECOLOGY Coral reefs budding produces new polyps, new polyps lay down new limestone  growth rate,  lifespan http://www.cdnn.info/eco/e04070 1a/e040701a.html

11. http://i2.cdn.turner.com/cnn/dam/assets/130201123703-01-guardian-0201-horizontal-gallery.jpg

12. IMPORTANCE Coral reefs symbiotic relationships with other plantlike protists animal habitat protects land from wave action tourism medical research http://www.cdnn.info/eco/e040701a/e040701a.html

13. IMPORTANCE Distribution of corals determined by: temperature water depth light intensity Problems of corals: Human activity Coral bleaching http://ih.constantcontact.com/fs113/1108454596610/img/168.jpg?a=1111854027677http://ih.constantcontact.com/fs113/1108454596610/img/168.jpg?a=1111854027677, http://www.breef.org/oldsite/Portals/0/coralmcavbleached%20Sandy%20for%20web.jpg, http://serc.carleton.edu/images/eslabs/corals/coral_bleaching_diagram.gif http://www.breef.org/oldsite/Portals/0/coralmcavbleached%20Sandy%20for%20web.jpg http://serc.carleton.edu/images/eslabs/corals/coral_bleaching_diagram.gif