lesson
Updated 6 days ago · 1 view
Have you ever wondered what happens to a crunchy cracker after you chew and swallow it?
We can build our own working digestive system using a plastic bag, orange juice, and a pair of tights!
Where does the big breakdown happen after you swallow? Let's step into the stomach.
The Stomach in a Bag
Put two crackers into a zip-top plastic bag, add a splash of orange juice, and seal it tight.
The plastic bag represents your stomach, and the acidic orange juice acts like your stomach acid breaking down food.
📊Create an interactive visual comparison between the kitchen model and the human stomach. On the left card: a zip-top bag filled with orange juice and crackers being squeezed by cartoon hands. On the right card: an illustrated human stomach churning food with gastric acid. Clear matching labels connect 'Plastic Bag -> Stomach Wall', 'Hands Squeezing -> Churning Muscles', and 'Orange Juice -> Stomach Acid'. Clean light background, warm orange and soft blue color scheme, rounded cards.
When you squish the bag with your hands, you copy the churning motion of stomach muscles turning solid food into a soupy liquid.
Now that the food is a soupy liquid, how does your body pull out the good stuff it needs for energy?
Filtering in the Tights
Cut a small corner off your bag and squeeze the soupy cracker mixture into the leg of a clean pair of tights.
The tights act like the small intestine, which has millions of tiny microscopic holes in its lining.
📊An animated diagram showing the tights model of the small intestine. A stocking tube contains soupy cracker mush. Gentle squeezing causes glowing yellow droplets (labeled 'Nutrients & Water') to seep through the mesh fabric into a surrounding container (labeled 'Bloodstream'). Thick, solid particles remain trapped inside the stocking tube (labeled 'Undigested Waste'). Clear, large 14px labels, smooth looping drip animation.