THIS DAY IN SCIENCE: National Forest Week (Sept 20-26) in 1994

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This demonstration uses food and a series of containers and additives to model the process of mechanical and chemical digestion in the human (mammalian) digestive system. The demonstration begins with actual food items and ends with a paste closely resembling fecal matter. Due to the high “gross” factor, this demo is a hit with students and is guaranteed to be very memorable.

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