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Legend:

1  bark
3  growth ring
4  pith
2  xylem

English name: Pine
Scientific name: Pinus sp.
Familia: Pinaceae
Classis: Coniferopsida
Phylum: Gymnospermae
Regnum: Plantae

The annual (growth) rings indicate how old this pine stem is (10 years).
Proceed to a detail of sections through the wood viewed by scanning electron microscopy