PPT-Phylum Annelida

1 Phylum Annelida Class Polychaeta Class Clitellata Phylum Annelida 2 Annelid Characteristics Defining Characteristics One or more pairs of chitinous setae The phylum includes polychaetes earthworms leeches and vestimentiferans. SEGMENTED WORMS. Don’t try this at home! . many bristles. SEGMENTED BODY. MANY WELL DEVELOPED SYSTEMS. BILATERAL SYMMETRY. CHARACTERISTICS. :. RAPTORIAL FEEDERS: ex: . CLAMWORM & BLOODWORM. Today we will study the annelids, the segmented worms, and the arthropods, a huge group that contains insects, spiders, and crustaceans. Three tissue layers are present in both of these groups. Also Annelid Characteristics. Annelids are to be found in marine, freshwater, and terrestrial habitats. The body is vermiform, bilaterally symmetrical, and segmented (. metamerism. ). Each segment is separated from contiguous ones by a transverse septum. Invertebrates. Chapter 6. Marine Ecology. Mr. Seifert. Cnidaria. Sponges. Platyhelminthes. Nematoda. Mollusca. Annelida. Annelida. General Characteristics. Segmented Worms. Hydrostatic Skeleton. Setae. Molluscs. BSC 2011L. Phylum Annelida. Segmented worms. Circular and longitudinal muscles work against fluid filled . coelom. to produce changes in width and length. Digestion – complete. Circluation. Laboratory 27 & 28. Introduction to Invertebrates. An . invertebrate. is an animal without a backbone. . The group includes 95% of all animal species. Introduction to Invertebrates. There is no escaping the invertebrates!. Annelida. Annelid: means “little rings”. Many body segments. Can include. marine species. Earthworms. Leeches. Characteristics and Classification. Bilateral Symmetry. Coelomates. Segmented (important evolution). Categories of Benthic Animals. >1 mm . macrobenthos. <.1 mm . microbenthos. Between .1 and 1 mm . meiobenthos. Major Taxonomic Groups of Benthos. Porifera. Coelenterata. Hydrozoa. Platyhelminthes. Phylum Platyhelminthes. Flatworms. Flat and thin bodies. Bilateral symmetry . Most are parasitic . Phylum Platyhelminthes. Flatworms include planarians, flukes, and tapeworms. 20,000 species of flatworms. At the top of . the page, write in big print . “ . Phylum Annelida”. .. You will receive . 1 . handouts. Cut out the entire box on each handout. . Use . your notes (pg. . 1-4. ) . to . answer question . Phylum Nematoda. Phylum Annelida. Choanoflagellates. The Worm Characteristics. Bilateral. symmetry – the simplest organisms to exhibit this type of symmetry. Invertebrates – use . hydrostatic. pressure to provide structural support (made of . Core. Course No. ZOOA – . P1T. , . Group-A. , . Topic . No. . 2 . Bilaterally symmetric, triploblastic, true coelomate animals.. Body vermiform , elongated, divided into three regions, . anteriormost. SYLLABUS - I External Marks: 40 Internal Assessment : 10 Time allotted : 3 Hours Note : Nine questions are to be set in all and the candidate are required to attempt five questions including c ompuls Zul. . Badmi. . 3. . Rendi. . Diwida. . Nasution. 4. Abdul . Rajak. 5. M . Andi. . Martada. . 6. . Maulidar. . 7. Cut . Nurul. . Hadiani. 8. . Haryati. Y. KELOMPOK 7. ANNELIDA ?. Cacing. Tanah.