heartwood


Значение термина heartwood в knolik


heartwood - heartwood
heartwood - Central mass of xylem tissue in trunks of trees, with no living cells (such as xylem parenchyma and medullary ray) and no longer functioning in water conduction but only for mechanical support; with its elements frequently blocked by tyloses and often dark-coloured, e.g. oak, ebony, impregnated with various substances (tannins, resins, etc.) that render it more resistant to decay than surrounding sapwood.

Рядом со словом heartwood в knolik


haversian canalsВ начало
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heliotropism

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