1. Epidermis: This is the outermost layer of cells covering the entire plant body, including leaves, stems, roots, and flowers. It's like the plant's skin, providing a barrier against:

* Physical damage: Protection from abrasion, wind, and insects.

* Water loss: The epidermis is often coated with a waxy cuticle that reduces transpiration.

* Pathogens: The epidermis helps to prevent the entry of bacteria and fungi.

2. Periderm: This is a secondary protective tissue that develops in woody plants as they grow older. It replaces the epidermis in stems and roots and consists of three layers:

* Phellem (cork): This is the outermost layer, made of dead cells with thick, waxy walls. It provides insulation and waterproofing.

* Phellogen (cork cambium): This is a layer of meristematic cells that produces new cork cells on the outside and phelloderm on the inside.

* Phelloderm: This is a thin layer of living cells that is often present beneath the cork layer.

Other noteworthy points:

* Specialized structures: The epidermis can have specialized structures like trichomes (hairs) and stomata (pores for gas exchange) that contribute to protection.

* Roots: The root cap, a protective layer of cells, covers the root tip and helps to protect it during growth.

* Bark: The bark of trees is a protective layer that includes the periderm and other tissues.

In essence, protective tissues are strategically placed throughout the plant body to ensure its survival and health. They act as a shield against the harsh environment and keep the plant functioning properly.