PPT-Invertebrates: Phylum

Mollusca Molluscs Large and diverse group Coelomates Bilateral symmetry three germ layers organ level of organization tubewithinatube body plan 30 1 Mollusca contd 3 body parts. Alycia. Reynolds Lackey . & Kate Steensma. etc.usf.edu. in·ver·te·brate. . /. inˈvərtəbrit. /. Noun:. an animal lacking both a skull and a backbone such as an arthropod, mollusk, annelid, etc.. When Carl Linnaeus first created his method for organizing animals, he had just two families of invertebrates:. . Insecta. (insects) and . Vermes. (worms).. Since that time, scientists have found more invertebrates and have created more classifications. We will talk about six . Review. At first, limit your learning to the features that are . unique. to a group and/or groups that “. invented. ” features or had “. firsts. .”. Use the characteristics given to name the group.. Q. What are invertebrates? Give examples.. A: Animals without backbones are called invertebrates. Ex jellyfish, spider and crabs don’t have back bones.. Q . How many kind of invertebrates are there on the earth?. Thrive in fresh water, salt water and soil.. Many are motile, with pseudopods (“false feet”) used for locomotion.. Some are parasitic species, found in animal intestines.. Entamoeba. . histolytica. 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!. More species (200,000 ) than any other animal phylum except Arthropoda. Soft body – often protected by CaCO. 3. shell. Unsegmented, typically bilaterally symmetrical. I. Phylum Mollusca. ©2004 Amanda Demopoulos. Aschelminthes : Roundworms Not the Phylum name 7 Phyla in this grouping Characteristics Most are freshwater Cylindrical Unsegmented Bilaterally symmetrical Triploblastic ( pseudocoelomates ) Dioecious Section 28.1. Sponges. Sponges were once classified as plants. Asymmetrical. Lack tissues and organs. Cell recognition makes. them animals. The Simplest Animals. Sponges belong to Phylum . Porifera. System of pores. ). (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: . 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 . 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. : . Polyplacophora. . Chiton . sp. . 1. Mostly . marine. , attached to rocks near the sea shore. . 2. The body is . oval . in shape, . convex above and flattened below. 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 .