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Question
Outer light coloured region of wood is known as
Outer light coloured region of wood is known as
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Solution
The correct option is D Sap wood
Sapwood is also called as 'alburnum'. It is outer, living layers of the secondary wood of trees, which engage in transport of water and minerals to the crown of the tree. The cells therefore contain more water and lack the deposits of darkly staining chemical substances commonly found in heartwood. Sapwood is thus 'paler' and softer than heartwood and can usually be distinguished in cross sections, as in tree stumps, although the proportions and distinctness of the two types are variable in different species. Heartwood, also called duramen, dead, central wood of trees. Its cells usually contain tannins or other substances that make it dark in colour and sometimes aromatic. Heartwood is mechanically strong, resistant to decay, and less easily penetrated by wood preservative chemicals than other types of wood. Early wood or spring wood is formed during spring season. It consists of xylem tissues with wider vessels, produced more in amount, less dense. Late wood or autumn wood is formed during winter season. It is formed after the early wood. Consists of xylem elements with narrow vessels and produced less in amount, more dense.
Sapwood is also called as 'alburnum'. It is outer, living layers of the secondary wood of trees, which engage in transport of water and minerals to the crown of the tree. The cells therefore contain more water and lack the deposits of darkly staining chemical substances commonly found in heartwood.
Sapwood is thus 'paler' and softer than heartwood and can usually be distinguished in cross sections, as in tree stumps, although the proportions and distinctness of the two types are variable in different species.
Heartwood, also called duramen, dead, central wood of trees. Its cells usually contain tannins or other substances that make it dark in colour and sometimes aromatic. Heartwood is mechanically strong, resistant to decay, and less easily penetrated by wood preservative chemicals than other types of wood.
Early wood or spring wood is formed during spring season. It consists of xylem tissues with wider vessels, produced more in amount, less dense.
Late wood or autumn wood is formed during winter season. It is formed after the early wood. Consists of xylem elements with narrow vessels and produced less in amount, more dense.
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