Heartwood used in a sentence

Heartwood in a sentence as a noun

Non-heart or mixed heartwood/sapwood redwood can look like what is shown.

The latter was used on the bow’s belly, which faced the archer, taking advantage of the fact that hard heartwood performs well under compression.

As the article explains, the longbow is composite, but made from a single piece of wood:"Figure 1 illustrates a yew trunk cross section and how a longbow stave was carved out of the tree to incorporate both its sapwood and heartwood components.