heart wood is resistant to microorganism. justify the statement.
Answers
As new rings of sapwood grow, the inner cells are put out of commission and become heartwood. The central, strong pillar of a tree is heartwood. Although this portion of the tree is dead or retired sapwood, it doesn’t decay. As long as the tree’s outer layers are intact, heartwood remains strong.
What occurs as moisture is no longer transported through the straw-like cells, the pores in Heartwood are filled with organic material. The presence of chemicals called extractives causes the cell walls in heartwood to change color. Extractives are what create the rich color and unique character in the heartwood.
The functional beauty of heartwood for a woodworker is threefold. First, it’s significantly less susceptible to fungus. Secondly, heartwood contains far less moisture than sapwood and will have far less shrinkage when it’s dried. Thirdly, heartwood becomes in some ways as strong as steel as the fibers are bound together.