When the juvenile wood get older and loses its functions it becomes heartwood.
Its the middle wood. Its the strongest.
Heartwood is wood that has died & become more resistant to decay as a result of deposition of chemical substances.
One can buy heartwood from a wood shop or woodcutter's yard. Heartwood is the dense inner part of a tree trunk and it is this section that is mostly used for the hardest timber.
The oldest wood in a tree stem is typically located at the tree's core in the center of the trunk, known as the heartwood. As the tree grows, newer layers of wood are added around the heartwood. The heartwood is no longer active in water transport but provides structural support to the tree.
there is no difference
The difference between wood and plastic is that the wood is opaque and the plastic is transparent.
The heartwood is ,as the name suggests, the oldest wood in the tree, it no longer transports sap or nutrients but is vital in the stability of the tree as it keeps it upright and pliable.
Heartwood is made up of older, inactive cells that have undergone a process called heartwood formation, which involves deposition of substances like resins, tannins, and gums. This makes heartwood denser, harder, and more durable compared to the sapwood, which consists of younger, living cells responsible for transporting nutrients. Additionally, heartwood is less susceptible to decay and insect damage due to the presence of these protective substances.
Heartwood
The heartwood of a tree doesn't actually do anything. It is center of a tree. It i s non-functioning, darker wood and sometimes dead. Heartwood supplies the flexibility to allow the tree to sway in the wind.
That it aromatizes and darkens wood, remains mechanically strong and resists decay and wood-preservative chemicals describes the function of heartwood in a woody plant. Heartwood also goes by the name duramen, from the same-spelled Latin word for "hardness." It represents the dead central wood, as opposed to the outer living layers, known as alburnum and sapwood, for mineral and water transport.
A pine is a softwood no matter how hard the heartwood is.