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canvas prints nature canvas prints arctium lappa canvas prints plant canvas prints stem canvas prints biology canvas prints botany canvas prints plant anatomy canvas prints light micrograph canvas prints light microscope canvas prints biological canvas prints black background canvas prints botanical canvas prints bundles canvas prints cross section canvas prints cross-section canvas prints

photographs nature photos arctium lappa photos plant photos stem photos biology photos botany photos plant anatomy photos light micrograph photos light microscope photos biological photos black background photos botanical photos bundles photos cross section photos cross-section photos

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Black burdock stem. Polarised light micrograph of a transverse section through the stem of a black burdock (Arctium lappa) plant. This stem has two rings of vascular bundles (yellow and red oval structures). Each vascular bundle consists of an outer cap of phloem fibres (yellow), phloem cells (red) and then xylem cells. Phloem cells transport carbohydrates around the plant, while xylem cells transport water. At centre is the pith, which contains starch grains, a store of energy. Magnification: x14 when printed at 10 centimetres wide.

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