Question

In xylem tissue, vessels and tracheids of the roots, stems and leaves are interconnected to form a continuous system of water-conducting channels reaching all parts of the plant. Explain how this is achieved.

Answer 1

1. Vessels are long tubular structures formed by the end-to-end joining of vessel elements. Their end walls are either perforated or absent, forming continuous tubes for easy water flow. 
2. Tracheids are elongated cells with tapering ends that overlap each other, allowing water to pass through pits.
3. The presence of pits in their walls helps in the lateral movement of water between adjacent cells. 
4. These elements are continuously connected from the roots, stem, and leaves, forming an unbroken pathway.

Thus, water and minerals can be efficiently transported to all parts of the plant.