The epidermis is the outermost layer of cells covering the stem, root, leaf, flower, fruit, and seed parts of a plant. The role of the epidermis in plants is as follows:

• Protection: The epidermis provides protection to the plant from mechanical injury, water loss, and infection.

• Regulation of gas exchange: The epidermis regulates the gas exchange in plant cells.

• Regulation of metabolic processes: The epidermis regulates the secretion of metabolic substances.

• Absorption of water and minerals: The root epidermis absorbs water and minerals from the soil.

• Secretion of substances: Various modified epidermal cells secrete substances.

In summary, the epidermis plays a crucial role in protecting the plant from external factors and regulating various processes that are essential for the plants survival.