Tapeworms are the dominant member of the class Cestoidea. They are ribbon-like‚ segmented creatures living in the intestines of their vertebrate hosts. There are a dozen orders in this class‚ most living in fish but two that use humans as hosts. Tapeworms cling to the intestinal wall of their hosts with suckers‚ hooks‚ or other adhesive devices. Having no mouth or gut‚ they receive their nourishment through their skin. Further‚ they have no type of sensory organs. White or yellowish in color‚ species
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Planarian Lab Report Hanna Klein Bishop Fenwick High School Planarian Lab Report Introduction Planarian worms are free-living flatworms that are not parasitic. Planarians have a three-cavity digestive system. Planarians are usually either carnivorous or scavengers. Planarians may eat other living‚ as well as dead‚ invertebrates‚ detritus or decaying organic matter. Planarians do not realize that are eating a lot‚ and can over eat resulting in death. Most planarians are freshwater forms that can
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Planaria are commonly known as flatworms. Ordinarily‚ these flatworms tend to stay near the edges or walls (Akiyama & Shitaro). They receive oxygen through their skin. They may not look like humans but their reactions to certain drugs or stimulants are quite similar to those of humans. Caffeine is known to increase individual’s energy and physical activity‚ leading to the question of how different concentrations of caffeine would affect planaria’s physical activity. Low doses of caffeine enhance
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Laboratory Report 4: Invertebrate Animals Section: I Table: 6 Date: September 26th‚ 2013 Introduction: In our group‚ our task was to observe the selected four invertebrates and familiarize ourselves with their taxonomic levels through the organism’s mechanisms of feeding‚ motility‚ and reproduction. Our group used the prior knowledge we possessed about the Hydra‚ Rotifer‚ Gammarus‚ and Planaria organisms to complete the lab. We knew that all of these small invertebrates have a
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Bryan A. Khan Dipylidium caninum This is a guide to inform you of the Dipylidium caninum parasite known as the flea tape of the tape worms. The following information will inform you on what it looks like‚ the host this parasite prefers‚ where it prefers to infect‚ clinical signs‚ a method of treatment‚ a method of prevention‚ and the public health significance. When dealing with a parasitic problem your first thought might be what is it and how to treat it? We are here to help!
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highly branched gastrovascular cavity which is the site of both digestion and circulation of nutrients. There is no separate exit‚ so undigested food has to leave by the mouth. There is no system within the body to distribute oxygen‚ this constrains flatworms to be flat‚ as they must respire by diffusion and no cell can be too far from the outside. Planaria are quite active‚ moving by contraction of muscle fibers that are oriented in different directions‚ in a manner similar to how we move our tongues
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chose to use flatworms due to their ability to grow into a new animal if cut in half or several pieces. This reproductive ability to regenerate is called fission and occurs in flatworms due to their embryonic stem cells called neoblasts. We obtained the flatworms used in this experiment by first placing a few drops of spring water on a petri dish so that the flatworms will be able to survive a couple of weeks‚ and not be dehydrated. Next‚ we used a pipette to gather the flatworm and then placed
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I. Platyhelmithes Kayla Smith A. Structure and Function of Flatworms Period 2 1. Flatworms are the simplest animals with bilateral symmetry. 2. The tissues in bilaterally symmetrical animals develop from three germ layers: Ectoderm‚ Mesoderm‚ and Endoderm. 3. In flatworms‚ the layers are pressed against one another to form a solid body. 4. Because flatworms do not have a hollow body cavity between the endoderm and mesoderm‚ they
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Cestoda (tapeworm) Kingdom: Animalia Phylum: Platyhelminthes Class: Cestoda Order: Cyclophyllidea Family: Taeniidae Genus: Taenia Linnaeus‚ 1758 Tapeworms can grow from 63 centre meters to 15 meters.Tapeworms look like a ribbon that is flat and segmented. tapeworms like to live in our humans digestive system and eat all the food we eat because they can’t chew the food. Tapeworms are simple in design‚ but ruthless in action. They consist of two organs. The first to the wall of the
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Biology 1309 Review Kingdom Animalia-Protostomes Match the following characteristics with the phylum that they describe; 1. First phyla of animals in which the digestive system is complete. NEMATODA 2. Acoelomate. Platyhelminthes 3. Pseudocoelomate. NEMATODA 4. First phyla of animals with cephalization. Platyhelminthes 5. First phyla of animals that is triploblastic. Platyhelminthes Define the following: 6. Cephalization= Animals with a concentration of nerves and sense organs in the
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