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Transverse section through the stem of pine showing bordered pits
Legend:
1 tracheid
2 bordered pit in tracheid wall
English name: Pine
Scientific name: Pinus sp.
Familia: Pinaceae
Classis: Coniferopsida
Phylum: Gymnospermae
Regnum: Plantae
Water transport between tracheids is possible through the primary wall at the level of the pits, but not in the other regions of the tracheids where the secondary wall is very thick.
