Xylem is a type of vascular tissue found in plants that transports water and dissolved minerals from the roots to the rest of the plant, including the leaves.

Here's how it works:

1. Absorption by Roots: Water and minerals are absorbed by the roots from the soil.

2. Movement through Xylem: The absorbed water and minerals travel up the xylem vessels, which are long, narrow tubes made of dead cells.

3. Transpiration: Water evaporates from the leaves through tiny pores called stomata. This creates a negative pressure that pulls water up the xylem.

4. Delivery to Leaves: The water and minerals are delivered to the leaves, where they are used for photosynthesis and other metabolic processes.

In addition to water, xylem also transports dissolved minerals, such as nitrogen, phosphorus, and potassium, which are essential for plant growth and development.