Heartwood
Cambium
Inner Bark
Outer Bark
Sapwood
Scientific name phloem; supply line that carries food from leaves to branches, stems and roots.
Cell layer that produces new bark (phloem) and new wood (xylem) every year.
The living xylem that transports water and nutrients up from the roots.
Composes most of the trunk and is made up of dead xylem cells; is like the backbone that supports the tree.
Dead phloem cells that protect the tree from diseases and insects.
