Stem and trunk are both parts of the organism called plants.
Stems are usually one of the structural axes in plant composition, it plays a lot of roles like to provide support for the fruits, bud, or leaves. It also helps in the transportation of minerals by providing a pathway.
The stem is very important for asexual reproduction. It also brings the leaves to light during photosynthesis. The stem plays a vital role in each plant because they are an indispensable part of the plants. After all, it contains xylem, phloem, and cambium.
The trunk is the part of a plant but mostly confined to trees. It carries the whole tree canopy. A trunk is directly attached to the tree roots. The truck is also characterized as the main tree stems.