All living things are made of cells
Why?
Every living thing is built from tiny pieces called cells, far too small to see without a microscope.
A camera zooms into an onion skin, closer and closer, until the smooth skin turns into rows of tiny brick-shaped boxes: the onion's cells.
Press the button to zoom closer and closer into an onion skin.
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A zoom into the tip of a child's finger reveals thousands of tiny round cells packed together like bubbles in foam.
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Worked example
Is a mushroom made of cells?