Give One Basic Functional Difference Between Phellogen And Phelloderm

Give one basic functional difference between phellogen and phelloderm.


Phellogen is a couple of layers thick. It is made of narrow, thin-walled and nearly rectangular cells. Phellogen cuts off cells on both sides. The outer cells differentiate into cork or phellem while the inner cells differentiate into secondary cortex or phelloderm.