The cork cambium, cork and secondary cortex a | vedclass

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(C) The cork cambium $(phellogen)$, cork $(phellem)$, and secondary cortex $(phelloderm)$ are collectively known as the $periderm$.$1$. $Phellogen$ (c

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periderm

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(C) The cork cambium $(phellogen)$, cork $(phellem)$, and secondary cortex $(phelloderm)$ are collectively known as the $periderm$.$1$. $Phellogen$ (cork cambium) is a meristematic layer that develops in the cortex.$2$. $Phellem$ (cork) is produced on the outer side of the $phellogen$.$3$. $Phelloderm$ (secondary cortex) is produced on the inner side of the $phellogen$.These three layers together form the $periderm$, which serves a protective function as the epidermis ruptures during secondary growth.

The cork cambium, cork and secondary cortex are collectively called:

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