Question

Why and how does water enter continuously into the root xylem?

Answer 1

Entering of water in root xylem:

1. Osmotic pressure causes water to continuously enter the root xylem.
2. Higher plants have complex permanent tissues called xylem that is present in all portions, including the root, stem, and leaf.
3. Four different cell types—one living (xylem parenchyma) and three dead—combine to form it (vessels, tracheids, and xylem fibers).
4. The root's cells are in direct touch with the soil and actively absorb ions.
5. As a result, the ion concentration inside the root rises, increasing the osmotic pressure and the rate at which water moves from the soil into the root.
6. Due to their thin walls, root hairs allow water to continuously enter the root xylem.
7. Tracheid cells and vessels, which are small, hollow, and elongated in shape, make up the xylem.
8. Since they feature channelized perforations that allow water to move readily through them, tracheids are primarily in charge of conducting water.
9. For support and to store different substances, the xylem also contains fiber cells and xylem tissue.