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...
Tobacco can affect the excretory system by causes colorectal cancer. Inability to absorb nutrients. 10 Effects Of Smoking Cigarettes For one thing it can affect acid production diminishing your stomachs ability to destroy harmful bacteria that enters the stomach allowing it to enter your upper small intestine. . Tobacco use causes atherosclerosis or clogging of the blood vessels. This is known as pancreatitis and it can lead to life-threatening complications. Mouth throat esophagus stomach small and large intestines liver pancreas gallbladder and anus. Carbon monoxide in tobacco. Smoking and exposure to tobacco. Some short-term effects of drug abuse on the digestive system can include. -Used to be called serum hepatitis. Smoking increases the risk of Crohns disease colon polyps and pancreatitis and it may increase the risk of gallstones. Drugs that affect the sympathetic system affect these chemical system...
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