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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.1/3
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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  1. 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.

  2. 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.

  3. 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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