PPT-Chapter 37-2 Annelida Phylum:

Annelida Annelid means little rings Many body segments Can include marine species Earthworms Leeches Characteristics and Classification Bilateral Symmetry Coelomates Segmented important evolution. 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. 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 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!. 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. Aschelminthes : Roundworms Not the Phylum name 7 Phyla in this grouping Characteristics Most are freshwater Cylindrical Unsegmented Bilaterally symmetrical Triploblastic ( pseudocoelomates ) Dioecious 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 . ). (8,761 known species). General Description: . Simplest animals, multicellular. No organs or body systems. Skeleton composed of spongin (soft) and spicules (hard). Symmetry: . Asymmetrical. Feeding: . https://. www.youtube.com. /. watch?v. =_2iXHBuSIJY. Phylum Mollusca, Class . Gastropoda. Phylum Mollusca, . Class . Cephalopoda. https://. www.youtube.com. /. watch?v. =os6HD-sCRn8. Phylum Annelida. 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 BY. MR LAOYE, B. J.. Email; . babafemif@abuad. .edu.ng. Instagram. : @. femilaoye. Telephone: (+234)8136916125. HEMICHORDATA. Hemichordates were formerly members of the phylum . chordata. But over the years they were separated from chordates because scientists found out that they lacked a Notochord. Subphylum : . Mastigophora. . Class : . phytomastigophora. . Family : . Euglenceae. . Genus : . Euglena . The . mastigophora. or flagellates characterized by having one or more flagella  . Member of Euglena are spindle shaped , greenish , this color caused by presence of chloroplast which contain chlorophyll . Phylum Spirochaetes. 4. . Phylum Spirochaetes. Gram . negative. Aquatic. . environments. ; . some. . pathogens. Unique. . morphology. . . Endoflagella. . 4. . Phylum Spirochaetes. Treponema: . animal and human hosts, microaerophilic, very sensitive to environmental stress .