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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.
Because the nutrients left in the tree fertilise the surrounding area
Xylem is the layer of wood in a tree next to the heartwood (dead center of a tree) and it carries water down and up the tree.
The center of a tree trunk is dead. It's called the heartwood. It's made up of nonliving cells that were called sapwood when they were living and younger. So heartwood is the older, dead version of the younger, living sapwood of a tree trunk.
Archie Bruce
On the little island there is a dead tree near the center. The skull and crossbones are the rock formation just to the right of that tree.
the center part of the tree is called the core.
Pruning a medlar is not essential as it is with other fruiting trees. You can thin branches to let more light into the center of the tree and remove dead wood, but that is generally all that is needed.
The Old Dead Tree was created in 1997.
The Old Dead Tree ended in 2009.
A dead tree is alive because there are many little bugs and critters living in the dead log !
Dead bark is weak armour and no longer needed from the tree.