Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

2. Tracheae

Explanation:

The xylem parenchyma among the dead tracheids and tracheary elements provides access for the lateral movement of water from vertical xylem elements towards cortical cells.

Xylem elements in the upper parts of pants is coated with a thin layer of cell sap.

So the trachea and tracheids with their large lumen and end to end association act as excellent pipelines for the movement of water, minerals and some organic compounds as well.