THIERRY BERROD, MONA LISA PRODUCTION / SCIENCE PHOTO LIBRARY THIERRY BERROD, MONA LISA PRODUCTION / SCIENCE PHOTO LIBRARY
Venus flytrap (Dionaea muscipula) leaf. Coloured scanning electron micrograph (SEM) of the leaf of a Dionaea muscipula venus flytrap, showing its sensory hairs (trichomes, black) and digestive glands (red). Venus flytraps are carnivorous plants that trap insects within their leaves. When an insect crawling along the leaf contacts two or more hairs within 20 seconds of each other, the two lobes of the leaf slam shut, trapping the insect between them. Enzymes are then excreted from the glands to dissolve the prey, and the plant absorbs the resulting nutrients. Magnification: x30 when printed 10 centimetres wide.
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