PPT-Flatworms, Roundworms, & Segmented Worms

Phylum Platyhelminthes Flatworms Flat and thin bodies Bilateral symmetry Most are parasitic Phylum Platyhelminthes Flatworms include planarians flukes and tapeworms 20000 species of flatworms. Platyhelminthes. : . the Flatworms. Platyhelminthes Vocabulary. Use the blue modern bio textbook to do these on your grid. Color should be on front. It doesn’t matter how you write the back. Remember to complete your squares and # them correctly on the back. Phylum: PLATYHELMINTHES. . VS.. Class . Turbellaria. includes: Planarians . Class . Cestoda. Includes: Tapeworms. Class . Trematoda. Includes: Flukes. II. Body Plan/Structure. Flatworms demonstrate a . Link to video. Flatworms - General Information. 3. . phyla in Ch. 14 – We are going to focus . mainly on . Phylum Platyhelminthes . Symmetry. : Bilateral. Cephalization. - head end concentrated with sense organs and nervous control. By: Megan Schwartz. What roundworms look like. thin, round body. smooth skin. have bilateral symmetry. many colors. Habitat of a roundworm. in humans, plants and animals. saltwater and freshwater. in muddy places. Mrs. . aRusso. Grade 7- Life Science. General Characteristics of Worms. Slender, legless invertebrates. Have . organs. (digestive, reproductive, etc.). Show bilateral . symmetry . (matching halves). Link to video. . Link to video. Flatworms - General Information. Symmetry. : Bilateral. Cephalization. - head end concentrated with sense organs and nervous control. Tripoblastic. - has a middle germ layer (mesoderm) as well as ectoderm and endoderm . phyla: . Platyhelminthes – flatworms (. Gk. ) . plati. . – flat. . . helminth. - worm. Nematoda. – roundworms, . nema. . (. Gk. ) ". thread". Annelida – segmented worms, . . . By: Nayarit Ayala and Marleni Cruz. Flatworms. Platyhelminthes. Structure. Flatworms are flat, soft bodied, ribbon shaped . unsegmented. , contain no body cavity, but they do have digestive cavity. They are bilateral symmetrical, while having only one opening. Flat worms have layers of tissues that surround their central gut. They are part of the acoelomates, and are considered hermaphroditic. Their type of cell layers are: an ectoderm, which is the outer covering, an endoderm, which is the lining of digestive spaces, and a mesoderm which is in between the other two. 3. Phylum Nematoda. Commonly called . roundworms. Cylindrical body shape. Multicellular. Cuticle – a body wall composed of an external, acellular, protective layer. Hypodermis – cellular layer beneath the cuticle . Hymenolepis. nana. – The Dwarf Tapeworm. Frequency - most common tapeworm infection in humans.. Requires no intermediate host - can use insects such as fleas or beetles, but these are not required.. Characteristics. . Unsegmented. worms. Simplest animals with. . Bilateral symmetry. No . specialized . circulatory. or . respiratory. system. (uses diffusion to transport oxygen and . nutrients). Core. Course No. ZOOA – . P1T. , . Group-A. , . Topic . No. . 2 . Bilaterally symmetric, triploblastic, true coelomate animals.. Body vermiform , elongated, divided into three regions, . anteriormost. Characteristics of Phylum Platyhelminthes (means “flat worm”). Flatworms have . three germ layers (. triploblastic. ); they are the first animal we have discussed in this class with . true organs and tissues. About Roundworms & Hookworms Protecting your pets protects your family What are roundworms & hookworms? You may already have heard that worms often infect puppies and kittens as well as older pets.