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metal prints nature metal prints tree-of-heaven metal prints tissue metal prints cell metal prints stem metal prints plant metal prints biology metal prints botany metal prints light micrograph metal prints lm metal prints plm metal prints light microscope metal prints circle metal prints biological metal prints cut out metal prints

photographs nature photos tree-of-heaven photos tissue photos cell photos stem photos plant photos biology photos botany photos light micrograph photos lm photos plm photos light microscope photos circle photos biological photos cut out photos

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Tree-of-heaven stem. Polarised light micrograph of a cross-section through the stem of the tree-of-heaven (Ailanthus glandulosa). Below the outer layers (red) is a ring of vascular bundles. Each vascular bundle consists of phloem (pink) and xylem (yellow). The phloem transports nutrients to the whole tree, whilst the xylem transports water. Most of the stem consists of a large central pith (blue), mostly consisting of parenchyma tissue. Magnification: x8 when printed at 10 centimetres across.

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