Lecture6PoriferaCnidaria1 - Lecture Topic finishing...

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Porifera and Cnidaria Slide 1 Lecture Topic: finishing Echinodermata moving on to Porifera and Cnidaria Reading: Invertebrates, CHAPTER 33, pages 638-670.
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Porifera and Cnidaria Slide 2 EchinodermScavenging QuickTime ¸ and a DV/DVCPRO - NTSC decompressor are needed to see this picture.
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Porifera and Cnidaria Slide 3 Ophiuroidea Brittle stars have a distinct central disk and long, flexible arms
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Porifera and Cnidaria Slide 4 Echinoidea Sea urchins and sand dollars have no arms, but they do have five rows of tube feet that function in movement
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Porifera and Cnidaria Slide 5 Crinoidea Sea lilies live attached to the substrate by a stalk, crawl about using their long, flexible arms Have been around for more 500 million years
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Porifera and Cnidaria Slide 6 Holothuroidea sea cucumbers upon first inspection do not look much like other echinoderms lack spines, and their endoskeleton is much reduced
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Porifera and Cnidaria Slide 7 EchinodermCukeFeeding QuickTime ¸ and a DV/DVCPRO - NTSC decompressor are needed to see this picture.
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Porifera and Cnidaria Slide 8 Concentricycloidea Sea daisies were discovered in 1986 and only two species are known Figure 33.40, page 667
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Porifera and Cnidaria Slide 9 Lecture Topic: Porifera and Cnidaria Reading: Invertebrates, CHAPTER 33, pages 638-670.
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Porifera and Cnidaria Slide 10 phylum Porifera sessile and have a porous body and choanocytes (aquiferous system) highly totipotent nature of sponge cells live in both fresh and marine waters lack true tissues and organs
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Porifera and Cnidaria Slide 11 PoriferaBasic
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Porifera and Cnidaria Slide 12 phylum Porifera class Calcarea - spicules of calcium carbonate laid down as calcite class Hexactinellida - glass sponges, 6- rayed (hexactinal) siliceous spicules class Demospongiae - siliceous spicules often replaced by collagenous network
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Porifera and Cnidaria Slide 13
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Porifera and Cnidaria Slide 14 glass sponges
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Porifera and Cnidaria Slide 15 PoriferaFluorescein
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