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A rasp, a saw and a sponge—all built into animals

A snail eats with a rasp.
Inside its mouth, a ribbon of tiny teeth scrapes food from a surface. That ribbon is called a radula.

A sea snail scrapes. A sawfly cuts. A fly drinks. Follow three familiar actions down to the tiny structures that make them possible.

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A snail eats with a rasp.
Inside its mouth, a ribbon of tiny teeth scrapes food from a surface. That ribbon is called a radula.
A sawfly cuts a place for her eggs.
At the end of her abdomen, toothed blades cut plant tissue. Her egg-laying tool is called an ovipositor.
A fly drinks with a sponge-like pad.
Two broad lobes at the end of its mouthparts collect liquid food. Tiny grooves guide the liquid inward.

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