What are the vessels in plants that transport sugars called?

The vessels in plants responsible for transporting sugars are called phloem. Phloem is crucial for the distribution of photosynthetic products, primarily sucrose, produced in the leaves during photosynthesis. This transport process, known as translocation, moves sugars from the leaves to other parts of the plant, including roots, stems, and growing tissues, where they are used for energy or stored as starch.

Xylem, on the other hand, is primarily involved in transporting water and minerals from the roots up through the plant. Stomata are small openings on the surface of leaves that facilitate gas exchange, allowing carbon dioxide in and oxygen out, but they do not function in the transport of sugars. Thus, phloem is specifically tailored for the movement of sugars, highlighting why it is the correct answer.