DENDROLOGY

Detailed explanation-1: -The inner bark, or “phloem, ‘’ is the pipeline through which food is passed to the rest of the tree. It lives for only a short time then dies and turns to cork to become part of the protective outer bark. The cambium cell layer is the growing part of the trunk.

Detailed explanation-2: -Bark comprises all the tissues surrounding the xylem in woody plants. Broadly, bark includes an inner and mostly living region and an outer, dead one. Of all plant structures, bark has the most complex anatomical structure and ontogenetic origin involving two (and often three) different meristems.