Significance of Planarians Planarians are non-parasitic flatworms of the phylum Platyhelmintes found in fresh water like ponds or lakes. In my research paper I focused on Schmidtea mediterranea planarians found in Tusinia and southern Europe which are extensively used as a model organism to study development and regeneration process (Newmark 2012). Schmidtea mediterranea are chosen by researcher in molecular biology and genetics field because these planarians have diploid chromosomes and are hermaphrodite
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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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shows its ability to heal itself when injured. However‚ the human body is not the only living thing that has a way of healing with no help. Planaria‚ which are free-living flatworms‚ are known for their quick regeneration from a fraction of the body. Scientists have been studying planaria and the effects of magnetism on the regeneration rate of the planaria. The hypothesis of this experiment is that if the planarians are exposed to a certain number of magnets at a closer distance‚ then they will
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Abstract: Planaria were studied to test their movement in relation to the number of different sensory cues they were receiving. Planaria were placed into two similar environments where light was manipulated to simulate night and day with food particles also in the environment. Since the planaria‚ Dugesia‚ have both chemosensory and photo sensory abilities‚ the idea was to test whether eliminating one of the sensory cues would result in a further displacement from their original position. Through
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Planaria Regeneration in Ideal Temperatures vs. Cold Temperatures Christina Malfas Abstract Planaria are flatworms that live in quiet freshwater bodies. They live in a narrow range of temperatures‚ from 22-24°C. They regenerate asexually‚ specifically through a process called epimorphosis‚ in which they completely regenerate one half of their bodies after splitting themselves in two. The diffusion gradient model assumes that cells in an organism “know” their orientation on that organism due
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of planaria cells after a portion of their bodies was cut off. Background: 1. A blastema is a group of cells that forms at the site of a wound that eventually turns into the missing parts of a planaria. 2. Planaria fission occurs when a planaria is missing body parts. The organism attaches its tail-end to the ground and pulls itself forward using its head-end in order to tear itself into two parts. Then‚ each of these parts grows back the missing half‚ producing two new identical planaria. 3
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Alec Long 3/29/13 2nd Hour How do Different Light Wavelengths Affect Planaria? 1. Background Information * Non-parasitic flatworm * Some have 2 eye spots‚ while others have several more * Move away from light * Have three germ layers- estoderm‚ mesoderm‚ and endoderm 2. Problem How do different light wavelengths affect Planaria? 3. Independent Variable Color of light 4. Dependent Variable Reaction to light 5. Experimental Group Group that receives
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Evrhett Davis‚ Andrew Staub Saint Joseph’s University Organismal Lab Tuesday Dr. Jonathon Fingerut December 1‚ 2013 Thigmotaxic Variation Between Cephalic and Caudal Regions in Planaria The development of a centralized nervous system in primitive animals provided a significant advantage resulting in the continuance of many species. Nervous tissue allowed organisms to expand into new methods of predation‚ protection and reproduction; encouraging specialization and eventually increased
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Can Planaria Retain Memory During Regeneration? Zoology 225 Submitted by: Abbie Danner Submitted to: Mrs. Godar May 5‚ 2015 Abstract The experiment was performed to find out if planarian can retain their memory after regeneration? The object was to discover if shocking a planarian and then shining a light on it for eight weeks‚ could be imprinted on each side of the planarian after being cut in half and left to regenerate. Once the planaria were left to regenerate for a week at the end
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Platyhelminthes Experimental Design: Planaria are free-swimming mostly freshwater flatworms. Flatworms are very unique creatures because they regenerate lost parts. My groups experiment was‚ The Effect of Darker Regions on Planaria Movement. The purpose of this experiment was to see whether or not the planaria preferred the white region or the dark region. My hypothesis was‚ If the Planaria are placed on the white side then they will move to the dark side because the planaria have a strong negative geo-tropism
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