Heartwood

Heartwood is the dense, inner core of a tree trunk, formed as the tree ages. It consists of old, non-living xylem cells that have become darker and more resistant over time. Unlike the outer, living sapwood that transports water and nutrients, heartwood provides structural support and stability to the tree. It is often more durable and less prone to decay, making it valued for wood products like furniture and flooring. Essentially, heartwood is the tree's central, hardened, and protective core that contributes to its strength and longevity.