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.
Black Mangroves. The Black mangrove s real name is Avicennia germinans. Just like other mangrove trees, they also provide a home for fish, birds and other wildlife as well as protect the coast and the coral reefs. The Black mangrove got its name because of the colour of its wood, dark brown to nearly black.lack mangroves also produce seeds with mangrove saplings. They are not pencil-shaped like the propagules of the Red mangrove. Instead, they are small and oval. But they can also float for long periods before the sapling roots.