The stem attaches almost all the parts to itself and helps keep the plant upright. It also acts like a highway in that it brings nutrients to other parts of the plant. A bud is a flower that hasn't bloomed yet. A branch is attached to the leaf and the stem. Leaves have vines and chlorophyll in them.
Roots are the lowest part of a plant.
They drink water and help the plant get nutrition from the soil. Bark covers and protects the tree. It is the outer part. See a picture . See a second picture .