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.
Or read below to understand some of the different characteristics of wood types before starting your project. You may have heard the term lumber in reference to wood used for building. Lumber simply refers to wood to be used for construction work. A lumber yard is where lumber and wood products for construction are sold. There are two common types of wood: hardwoods and softwoods. Hardwoods. Hardwoods come from deciduous trees. Deciduous trees are trees that shed their leaves. Hardwoods tend to be more expensive and include mahogany, cherry, maple and oak. Hardwoods are sold by the board foot, which is defined as a square foot of rough lumber that is 1 inch thick.