EVERYDAY SCIENCE

Detailed explanation-1: -The growth of these secondary vascular tissues pushes the pericycle outward and splits the cortex and epidermis. The pericycle becomes the cork cambium, producing cork cells (outer bark) that replace the cortex and epidermis.

Detailed explanation-2: -cambium, called the phellogen or cork cambium, is the source of the periderm, a protective tissue that replaces the epidermis when the secondary growth displaces, and ultimately destroys, the epidermis of the primary plant body.

Detailed explanation-3: -As the plant matures, the outer layer epidermis is replaced by bark tissues.

Detailed explanation-4: -The bark of the tree consists of many layers, such as the periderm, primary cortex, pericycle, and primary and secondary phloem. These tissues that make up the bark of the tree are present outside the vascular cambium.

Detailed explanation-5: -The bark serves as a protective layer for the more delicate inside wood of the tree. Trees actually have inner bark and outer bark–the inner layer of bark is made up of living cells and the outer layer is made of dead cells, sort of like our fingernails. The scientific name for the inner layer of bark is Phloem.