Resin canal

Resin canals or resin ducts are fusiform intercellular spaces surrounded by epithelial cells which secrete resin. Canals are lined with 6–8 thin-walled cells and surrounded by layers of parenchyma cells. This tissue spreads out to the sides like wings and merges with the canal.

A three dimensional lattice of canals runs both axially through the wood and radially within medullary rays. Axial canals (also called longitudinal canals) are usually found in late wood, or denser wood grown later in the season.

Resin is both antiseptic and aromatic and prevents the development of fungi and deters insects.

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