What is bark made out of on a tree?

Question

What is bark made out of on a tree?

Answer 1

Um.........Wood...

Answer 2

licorice......

JK

the base of the tree primarily grows from the inside out and as the tree matures and new cores are being generated the outer core gets rough from weather and cracks from the core growing within it like the trees skin  ever notice the rings in a cross section of a trunk

it is wood but due to weather and stress it is not as stable a medium as the inner wood

Here is a scientific answer if that is what you were looking for

http://www.caf.wvu.edu/bark/whatis.htm

The term " bark" is used most often in a nontechnical context and refers to all tissues external to the vascular cambium (Srivastava 1964, Esau 1965). Accordingly, the bark is an aggregation of organs and tissues that includes phloem and secondarily thickened tissues from the secondary plant body, as well as epidermis, cortex and phloem derived from the primary plant body (Esau 1965). The term bark was used by earlier authors in a technical context in reference to all dead tissues exterior to a deep-seated periderm (de Bary 1884, Büsgen and Münch 1929). Contemporary authors refer to this aggregate of dead tissues, which consists of alternating layers of periderms and associated tissues, as "rhytidome", a term often considered synonymous with the term "outer bark" (Eames and MacDaniels 1947, Esau 1965). The living organs of the bark consist of the phloem and the living tissues of the innermost periderm, the phellogen and phelloderm. All living tissues have been collectively termed the "inner bark" (Eames and MacDaniels 1947). Borger (1973) provided an excellent discussion of the development and shedding of characteristic bark types. Trockenbrodt (1990) has provided an informative survey and discussion of terminology used in the bark anatomy literature