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