The trunk of a tree is called a 'bole'.
Yes. A trunk is not only a stem but it is the main stem of a tree.
baobab tree
trunk
Bole
The woodpecker
The name of the stem of a plant is called a stalk. If it is soft it is a herbaceous Weak ones are called climbers, and swollen or broken ones are called galls.
Bark covers a tree trunk.
the outer part of a tree trunk
Tree trunk is a compound word
the outer part of a tree trunk
The tree has a trunk shaped like a bottle - wide at the bottom and narrower at the top.
Cellulose makes the trunk of a tree sturdy.