The Digestive and Endocrine System Game
For the journal, see Digestion journal. Depending on your audience you could pause here and mention the process of vomiting. Ruminants have a fore-stomach with four chambers. Explain that the small dish is like your mouth. Scientific American Library, New York. This secretion system transports various molecules, from ions, drugs, to proteins of various sizes 20 — kDa. It has three important jobs:.
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Liver production of bile: Gluconeogenesis from glycerol and amino acids deamination. Breaks down fats, makes cholesterol, makes lipoproteins used to transport fats. Stores vitamins A, D and B12 and iron. Blood sugar too low: Blood sugar too high: Ducts draining to duodenum and gall bladder. Bile storage in gall bladder Gall bladder stores excess, unused bile, and concentrates it.
Secretes it when needed. Bile breaks down large fat droplets into smaller microscopic droplets by forming micelles. This increases the total surface area of the fat for lipase action. Pancreas production of enzymes, bicarbonate Pancreas is the major source for all the digestive enzymes. Amylase - digests starch. Lipase - digests fat. Ribonuclease - digests nucleic acids. Small intestine absorption of food molecules and water Small intestine is the major place for digestion and absorption.
Folds, villi, and microvilli increases the surface area for absorption. Absorbs digested food into circulation fats into lacteals, all others into capillaries. Take a section of nylons or tights open at both ends and a smooth round object. Hold the section of tights up with the round item in it, showing that gravity is not forcing the egg through the tights. Using your hands you can demonstrate the contraction of muscles that pushes the food through.
This one really floors the kids. The idea for this demonstration came from a combination of one of the hands-on labs included in our Real Science Odyssey Life Level One curriculum a good example of the simple activities that curriculum includes for hands-on learning and the Science Matters blog. We cut various strings and yarns to the length of the actual organs in the digestive system. I liked the idea of making each item a different color or thickness to more clearly show the relative sizes.
I used a thin rope for the small intestine and a thick rope for the large. It helped my son understand and then explain to others that the small intestine is actually much longer than the large intestine, but is smaller in diameter.
Other than the specific resources I listed already, these are the books and other things we used to learn all about the digestive system. Magic School Bus Human Body: Easy Make and Learn Projects: Human Body has a terrific digestive system poster with flaps. We blew this up and used it as our display at science fair. This book has fun-to-read explanations and a lot of hands-on demonstrations and experiments for the entire body.
This was a good idea. I am a 7th grade science teacher and the lab I had planned tomorrow was boring and very forgetful. An interesting and a simplified method to explain the process of digestion to the 7th grade scholars. Your email address will not be published. You may use these HTML tags and attributes: Notify me of follow-up comments by email. Notify me of new posts by email. Demonstrating the Steps of Digestion: Visualizing the length of the digestive system: Have fun with hands-on learning about the digestive system!
October 26, at I will be Clipping this to use later on when we get to it again. November 7, at February 10, at 9: October 10, at 8: October 20, at You have made our day with these demonstrations!!!!!!
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