Though it is not strictly part of the usual diarthrodial joints, the structure of the intervertebral discs is shortly presented as its pathology is very common problem. Two main parts of the intervertebral discs are the outer ring (annulus fibrosus) and the inner gelatinous material.
In Australia, Ireland, New Zealand and Britain, the term timber describes sawn wood products, such as floor boards. In the United States and Canada, generally timber describes standing or felled trees, before they are milled into boards, which are called lumber.n the United Kingdom, the word lumber is rarely used in relation to wood, and timber is almost universally used in its place; but lumber has several other meanings in Britain, including unused or unwanted items.
The most readily available plantation timbers in Australia are softwoods such as Hoop Pine, Radiata Pine and Slash Pine, the two latter of which are introduced species.Regrettably, there is an undersupply of plantation-grown Eucalypt and other hardwood species on the Australian market.Many eucalypt plantations growing in NSW-apart from mainly bluegum and blackbutt-are generally not yet mature, or their trees are not currently being processed as sawlogs.nofficial reports indicate, however, that (treated) sewage-fed hardwood species can equal the rapid growth rates of Radiata Pine. Australian hardwood plantation timbers are mainly used for low-value applications such as pulp and paper products, their fibre being considered superior to that from native forest trees.