Epidermis could refer to: In plants, the outermost layer of cells covering the leaves and young parts of a plant is the epidermis. General Biology, 11th Edition.St. C. V. Mosby . It is mostly made up of flat, scale-like cells called squamous cells. The epidermis is the outermost layer of our skin. Under the squamous cells are round cells called basal cells. Definition: The epidermis is the outer layer of the three layers that make up the skin, the inner layers being the dermis and hypodermis. 1983. Epidermis definition, the outer, nonvascular, nonsensitive layer of the skin, covering the true skin or corium. epidermis [ep″ĭ-der´mis] (pl. Although they serve a number of important functions, their primary role is to protect from a variety of harmful factors (environmental stressors) including microbes, chemical compounds as well as … The dermis is present beneath the epidermis layer that comprises a pilosebaceous unit, fibroblasts, collagen, mast cells and capillaries. Skin is made up of three layers. the outermost and nonvascular layer of the skin, derived from the embryonic ectoderm, varying in thickness from 0.07 to 1.4 mm. It is the outermost, protoderm-derived layer of cells that covers seeds, fruits, flowers, leaves, roots, and stem parts. Content: Human Skin Layers. epider´mides) (Gr.) Learn with flashcards, games, and more — for free. The outermost is the epidermis. The epidermis is an outer protective cell layer that provides protection against infection, mechanical injury and water loss in plants. Epidermal cells include several types of cells that make up the epidermis of plants. The epidermis is made of four main layers, or strata: The stratum corneum is the thick, tough outer layer. Louis, MO. Epidermis. In invertebrates, the outermost layer of cells of the organism.. epidermis outer layer of skin cells Source: Noland, George B. Definition of Skin home >> biology >> definition In plants , the outermost layer of cells covering the leaves and young parts of a plant is the epidermis . See more. Medical Definition of Epidermis. Definition - What does Epidermis mean? In vertebrates, epidermis is the outermost layer of the skin. Its main purpose is protection. Medical Author: William C. Shiel Jr., MD, FACP, FACR; Epidermis: The upper or outer layer of the two main layers of cells that make up the skin. This consists mainly of cells called keratinocytes, made from the tough protein keratin (also the material in hair and nails). Under the squamous cells are round cells called basal cells. In vertebrates , epidermis is the outermost layer of the skin . epidermis definitions - from layers, to function, and structures. The epidermis is mostly made up of flat, scale-like cells called squamous cells. 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