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Describe How the Planarian Uses Its Pharynx to Obtain Food

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The body is elongated flattened and some-what conical. There are no digestive juices but large phagocytic cells that line the gastrovascular cavity pick up nutrients which then diffuse through them into other cells in the animal. Planaria Digestive System Video Lesson Transcript Study Com Nutrients from the food diffuse through the wall of this tract and into the animals cells. . Observe the worm using a microscope or hand lens. When conducting this experiment again it would be best to use more sources of food to feed the planaria. If you shine a flashlight on the planarian it will attempt to move out of the light. Use the space below to write or draw your observations. Thus planarians divide neither at a pole nor at the pharynx but have a nonzero probability of dividing anywhere else along the headtail. To observe and quantify planarian chemical-sensing behavior a tractable assay method for tracking chemotaxis behavior wa...
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