PPT-Hymenolepsis The Platyhelminthes (Flatworms): Tapeworms

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. By: Alexey Pomogaev, Daniel Cho, Connor Healey. Flatworms and Roundworms. Flatworms. Phylum- . Platyhelminthes. Class-. . Turbellaria, Cestoda, Trematoda, Monogenea. Families- . 102 variations. Roundworms. 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. TAPEWORM. BackGround. Tapeworms are flat segmented worms that live in the intestines of some animals. Animals can become infected with these parasites when grazing in pastures or drinking contaminated . Belong to the KINDGOM ANIMALIA. PHYLUM PLATYHELMINTHES. Characteristics. Three germ layers (endoderm, ectoderm, mesoderm). Bilateral symmetry. Cephalization (has a head). 4. . Acoelomates . = without . 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 . 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. PLATYHELMINTHES. (flatworms, tapeworms). Porifera. Cnidaria. Ctenophora. Platyhelminthes. Rotifera. Nematoda. Nemertea. Mollusca. Annellida. Arthropoda. Bryozoa. Phoronida. Brachiopoda. Echinodermata. 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. Period 5. General Description. Phylum- Platyhelminthes contains flatworms. Soft, unsegmented, & flat (no more than a few mm thick). Tissues (tripoblastic) & internal organ systems. Simplest animals to have: 3 embryonic germ layers, bilateral symmetry, & cephalization. Characteristics. . Unsegmented. worms. Simplest animals with. . Bilateral symmetry. No . specialized . circulatory. or . respiratory. system. (uses diffusion to transport oxygen and . nutrients). 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 . 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.