The plant cells that carry food are called sieve tube members or sieve tube elements. They are part of the phloem, which is the vascular tissue responsible for transporting sugars and other nutrients throughout the plant.

Here's a breakdown:

* Phloem: The vascular tissue that carries food (sugars) from the leaves, where they are produced by photosynthesis, to other parts of the plant.

* Sieve tube members (elements): Long, thin cells that form chains called sieve tubes. They are connected end-to-end by sieve plates, which have pores that allow the flow of sugars.

* Companion cells: Specialized cells that are located adjacent to sieve tube members. They provide the sieve tube members with energy and other essential materials, as they lack many organelles (like nuclei) due to their specialized function.

So, while other plant cells may store food temporarily, sieve tube members are specifically designed for the transport of sugars throughout the plant.