The epidermis is the outermost layer of our skin. Learn with flashcards, games, and more — for free. It is the outermost, protoderm-derived layer of cells that covers seeds, fruits, flowers, leaves, roots, and stem parts. home >> biology >> definition In plants , the outermost layer of cells covering the leaves and young parts of a plant is the epidermis . Content: Human Skin Layers. Definition - What does Epidermis mean? The epidermis is an outer protective cell layer that provides protection against infection, mechanical injury and water loss in plants. C. V. Mosby . Epidermis could refer to: In plants, the outermost layer of cells covering the leaves and young parts of a plant is the epidermis. Epidermis. Definition: The epidermis is the outer layer of the three layers that make up the skin, the inner layers being the dermis and hypodermis. The epidermis is made of four main layers, or strata: The stratum corneum is the thick, tough outer layer. General Biology, 11th Edition.St. The dermis is present beneath the epidermis layer that comprises a pilosebaceous unit, fibroblasts, collagen, mast cells and capillaries. the outermost and nonvascular layer of the skin, derived from the embryonic ectoderm, varying in thickness from 0.07 to 1.4 mm. Epidermal cells include several types of cells that make up the epidermis of plants. The outermost is the epidermis. Subcutis is the innermost layer containing loose connective tissues, fatty tissues and elastin, which acts as an intermediate link between the skin and bones. epidermis definitions - from layers, to function, and structures. It is mostly made up of flat, scale-like cells called squamous cells. 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 … epider´mides) (Gr.) In vertebrates, epidermis is the outermost layer of the skin. Skin is made up of three layers. Medical Definition of Epidermis. This consists mainly of cells called keratinocytes, made from the tough protein keratin (also the material in hair and nails). Epidermis definition, the outer, nonvascular, nonsensitive layer of the skin, covering the true skin or corium. Under the squamous cells are round cells called basal cells. See more. Its main purpose is protection. Definition of Skin 1983. In vertebrates , epidermis is the outermost layer of the skin . The epidermis is mostly made up of flat, scale-like cells called squamous cells. epidermis [ep″ĭ-der´mis] (pl. Under the squamous cells are round cells called basal cells. 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. In invertebrates, the outermost layer of cells of the organism.. epidermis outer layer of skin cells Source: Noland, George B. Louis, MO. 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