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Close ups of sections through the xylem of pine

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1  tracheid
3  small bordered pits
4  ray with pores
2  bordered pit

English name: Pine
Scientific name: Pinus sp.
Familia: Pinaceae
Classis: Coniferopsida
Phylum: Gymnospermae
Regnum: Plantae
A. Transverse view. B. Radial. C. Tangential
Light microscopy images of xylem of a pine in close up views. The bordered piths connect the tracheids (vessels) and can act as valves to close the connections in case of pressure differences between two neighbouring vessel elements. These pressure differences can occur in case of leakage or blockage in one of the vessels.

last modified: 5 Jun 2014