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hair
- A multicellular, filamentous structure, consisting of dead keratinized cells, which projects from the epidermis of mammalian skin. It consists primarily of the protein keratin. The section of a hair below the skin surface (the root) is contained within a hair follicle, the base of which lies within the dermis and produces the hair cells. hair plays a role in maintaining body temperature by reducing heat loss from the skin.
- A single-celled or many-celled outgrowth from an epidermal cell of a plant.
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• ANATOMY AND PHYSIOLOGY
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