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Cross-section of white dead nettle stem

Cross-section of white dead nettle stem

B725/0103

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY. DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY.

Caption

Scanning electron micrograph of a cross section through a white dead nettle stem, Lamium album. The micrograph shows a vascular bundle (central oval) consisting of xylem & pholem. The xylem transports water & minerals while the pholem carries sugar from the leaves to the rest of the plant. The arms leading off the xylem form the collenchyma, a layer of specialised strengthening tissue running almost continuously around the stem. The cells to the left of the xylem form the pith. Large empty cells, they degenerate as the stem grows, giving rise to a central cavity. The cells to the right make up the cortex. Mag: X 220 (10x8 size), X30 (at 35m size).

Release details

Model release not required. Property release not required.

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