50.0 MB (5.1 MB compressed)
4504 x 3880 pixels
38.1 x 32.8 cm ⏐ 15.0 x 12.9 in (300dpi)
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EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY
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Poppy seed capsule. Coloured scanning electron micrograph (SEM) of a section through the seed capsule from an opium poppy (Papaver somniferum), showing chloroplasts (green) and tracheid cells (spiral tubes) of the vascular bundle. At bottom the spongy mesophyll cells (sponge-like) store a milky sap, which contains up to 40 different psychoactive alkaloids, including morphine, codeine, papaverine and noscapine. Magnification: x530, when printed 10 centimetres wide.
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