Companion cells provide the energy for the sieve cells. The end walls of the sieve cells have pores through which sugar is transported from cell to cell.

Either way, they are never wanted. We’re talking about those annoying white strings on bananas, or more technically, “phloem bundles.” (Appetizing name, right?) Anyone who’s peeled a ...

The vascular network consisting of phloem and xylem (wood) provides plants with structural support and long-distance transport that specifies further downstream processes in the sink tissues (such as ...

The commenter continued that as time passes, the xylem and phloem (vascular tissues in plants that transport water, nutrients, and food throughout the plant) expand with the width of the tree ...