In what part of the stem are the vessels located?

The vessels are located in the conductive tissue of the stem – in the wood. Also present in small size around its core.
It is through the vessels that water and various nutrients flow from the roots to the leaves.
Vessels are annually formed by cambium: in spring they are thin-walled, and in autumn they are thick-walled. This affects the light-dark color of the wood and the formation of rings.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.