Question

What are passage cells?

Answer 1

In the roots, there are certain endodermal cells which are modified to allow the transport of water. These are the cells which are opposite to the protoxylem elements. These cells have a thin wall and there is no deposition of suberin-like the Casparian strips. These cells are known as passage cells due to its function to transport water and minerals salts from the cortex to the xylem elements.