Feel your upper lip. Is it a long flap that covers your mouth? A worm has a hunk of skin like a tongue on its upper lip. It uses the flap like a finger to scrape dirt into its mouth.
Touch your teeth. A worm has no teeth. When its mouth is full, it snaps the long lip closed and squishes the dirt down its throat to its gizzard. A gizzard is like a stomach full of moving sand. It grinds up whatever a worm shoves down its throat.
Do you suck in huge bites of food and seal your mouth with your upper lip? Do you ram the food down your throat so a gizzard can do the chewing? You do? You might be a worm.
(Excerpt from book Ask Me If I'm A Worm)
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