Table of Contents
What is Wood Tissue?
Wood tissue is the cellular tissue in wood. The cells are long and thin, and are arranged in a series of concentric circles around the central pith. The cells are filled with starch granules, which give wood its strength and stiffness. The cell walls are made of cellulose and lignin, which give wood its toughness and resistance to decay.
What are the main types of Wood Tissue
Wood tissue is the tissue that makes up the xylem of a tree. The main types of wood tissue are xylem parenchyma, xylem ray, and xylem vessels.
Secondary Growth
The secondary growth of a tree is the growth that takes place after the tree has reached its full height. This growth is responsible for the tree’s widening trunk, branches, and leaves. Secondary growth is caused by the activity of the cambium, a layer of cells just below the bark that divides and multiplies to create new wood cells. The cambium is fueled by the food the tree takes in from its roots.
The Activity of Cork Cambium
The cork cambium is a layer of actively dividing cells located just beneath the bark of a tree. This layer of cells produces new cork cells that slowly push the old, dead cork cells to the surface of the bark. The cork cambium also produces new layers of phloem and xylem tissue beneath the bark.
Bark
ing is the action of dogs when they communicate with each other or with humans. It is usually done along with a wagging tail, which is a sign of happiness. Dogs bark for various reasons such as to greet people, to ask for things, to tell others they’re unhappy, or to warn of danger.
Lenticels
are small, elongated openings on the surface of a plant that allow for the exchange of gases between the plant’s interior and the environment. They are most commonly found on the bark of trees, where they allow for the exchange of oxygen and carbon dioxide between the tree’s interior and the atmosphere.
Wood Yielding Plants
Woody plants are those that have a hard, persistent stem or trunk, usually bearing leaves and flowers on short lateral branches. The stem is the main structural member of the plant and is usually divided into branches, which in turn are divided into smaller branches and twigs. Woody plants are usually perennial, living for more than one year, and may have a life span of many years. Some, such as oaks and birches, may live for centuries.
