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