How does the cork act as a protective tissue?

(N/A) Cork is a protective tissue composed of dead cells rich in $Suberin$,which forms a thick and waterproof covering on older stems and roots.
$Suberin$ is a waxy,waterproof substance that restricts the movement of water.
The presence of $Suberin$ in the dead cells of the cork and the absence of intercellular spaces make these cells impermeable to water and gases.
This structure protects the underlying tissues from desiccation,mechanical injury,and pathogenic infection.