Wood structure

Making cross-section, can be most clearly consider the structure of the wood. Each block of unhewn tree has bark that is not used in the work, and be sure to take off. Under the bark of the tree is a zone of growth (cambium), which is almost invisible to the naked eye.
Spil with the fresh growing tree cambium layer is presented very well. After the bark is removed, a thin layer will damp cloth greenish color - is the cambium.
Under it is wood with growth rings, also known as sapwood. In the center of each tree is the kernel, which color can merge with sap or have a darker color.
Depending on this share sap wood species from which the nucleus has a distinct structure and the cells are as firmly as in the sapwood and heartwood, which, respectively, the core is clearly visible. Sometimes sap wood species called bezyadrovymi.
By Sound wood are all conifers (pine, cedar, spruce, yew, larch) and some deciduous (oak, ash, poplar) species.
Most deciduous trees are sapwood, or bezyadrovymi birch, hornbeam, alder and maple. In addition to the microstructure of wood, that is, the density of wood cells, the creation of the composition and the use of a bar in the wood affects the macrostructure presented growth rings and medullary vessels.
By macrostructure also include the presence of different knots, growths and undeveloped shoots (buds), who reject the annual rings and form various irregular grain.
Wood is the most clearly visible growth rings, horizontal and vertical vessel is the most interesting for processing.
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