PPT-Flatworms

Phylum PLATYHELMINTHES VS Class Turbellaria includes Planarians Class Cestoda Includes Tapeworms Class Trematoda Includes Flukes II Body PlanStructure Flatworms demonstrate a . 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. 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. Welcome to Discovery Education Player. Characteristics of flatworms. Soft, flattened worms with tissues and internal organ system. Simplest animals to have three embryonic germ layers. Bilateral symmetry . 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. 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. Animals Without Backbones Chapter 2: The Animal Kingdom Scientists keep track of Earth’s animal species by observing their similarities and differences . An animal with symmetry has body parts that match other body parts around a midpoint or 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. 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. Characteristics. . Unsegmented. worms. Simplest animals with. . Bilateral symmetry. No . specialized . circulatory. or . respiratory. system. (uses diffusion to transport oxygen and . nutrients). ). (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: .