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Tangential section through the stem of pine: tracheids with bordered pits, torus

Legend:

1  bordered pit
2  tracheid

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

The primary wall of in pits is permeable for water and minerals