Three major types of plant tissues are dermal, ground, and vascular tissues.
Dermal tissue covers the outside of a plant in a single layer of cells called the epidermis. Epidermal cells secrete a waxy substance called cuticle , which coats, waterproofs, and protects the above-ground parts of plants.
Ground tissue makes up much of the interior of a plant and carries out basic metabolic functions. Ground tissue in stems provides support and may store food or water. Ground tissues in roots may also store food.
Vascular tissue runs through the ground tissue inside a plant.