9 Parts Of Wood
Humans have used wood for thousands of years, ranging from fuel for cooking, lighting, making furniture, building materials, paper materials, and more. The use of parts of this tree as a whole or solid has been greatly reduced in line with the problem of global warming and the reduction of forest land in the world. Historically, timber plants that appeared in nature were first thought to have occurred in 395 to 400 million years ago. Besides being used to meet various human needs, wood can be used as a historical reference regarding climatic and weather conditions at the time the tree grows which can be seen from variations in the distance between growth rings.
In general, wood consists of 9 parts, namely:
1. Skin
Leather is one part of wood. This skin is the outermost part that is owned by wood. The skin itself has two parts, the first is the outer skin that is dead, and the second is the inner skin that lives. Outer skin that is dead has a different thickness. This thickness is based on certain tree species, dry, and also old colors on tree bark. The second bark is a living bark. Skin in life has a very thin thickness. The function of this inner bark is to transport the modified latex sap to the part of the tree that is growing. In addition, the skin can protect the inside of wood from damage caused by insects, pests, climate, and fires.
2. Cambium
The next piece of wood is the cambium. This cambium is a thin and clear network of wood. The shape is a kind of lender that is in the part between the skin and wood. In addition, the cambium function can also surround the wood, externally forming new bark and replacing old skin that is old and damaged, and in line with the formation of new wood.
3. Chubal
The part that consists of cells that are still alive and still functioning are responsible for distributing food from the leaves to other parts of the tree. This sapwood is located next to the cambium and functions as a liquid distributor and as a place to store nutrients in wood. This accumulation of nutrients will continue to provide the food needed by wood during its growth on the tree. This sapwood has a thickness of about 20 cm
4. Terrace of wood
This is the part that consists of cells that are old and die so they don’t work anymore. Even so, this part serves as an amplifier for tree growth. The terrace is more durable and has an older color than sapwood
5. Heart of wood
It is the middle part that comes from the original wood, the wood that was first formed by cambium and is soft and brittle in certain types of wood. But those that are hard on certain types of wood
6. Fiber
This section has a direction and size that varies depending on the type. Some are straight fibrous, some are bent, chime, choppy, and some are very small, medium or even large. Fiber is a cell composition that looks like a shaft and is long. The relative size of these cells is called texture..
7. Pores
The size of the hole size varies depending on the type.
8. The fingers
This is a network formed from the arrangement of radial cells from the outside to the center. This network is also called a radial network. These wooden fingers are perpendicular to the trunk from the skin to the liver which functions as a food channel that is easily processed in the leaves to help the tree grow. The better the radius of the tree, the faster the wood can be used as building material.
9. Circle of years
The year circle is the boundary between wood formed at the beginning and end of the season. The year circle can determine the age of a tree. If the age of the tree is old, then the function of the wooden part of building materials will also function optimally in strength and ease of use.
Utilization of wood for various human needs is now mostly used only as building materials, furniture, and paper-based materials only as a result of reduced forest land and the accompanying global warming problem. For the basic ingredients of the paper industry, the parts used are the ends and branches of trees. In fact, from one tree trunk, only 40-50% of the tree becomes a tree trunk. Saw wood is around 53% or around 21.2% from one tree trunk. After that, from sawn to furniture or furniture around 60%. In other words, only 12.72% of tree trunks are the furniture in our homes. That is why now found many furniture made from processed wood or wood dust waste because the price is cheaper.