. Elementary biology; an introduction to the science of life . Fig. 92. The touch organs of the skin We perceive touch or heat or cold according to the end organ that is stimulated. These end organs, d, lie beneath the epidermis, a, and contain endings of nerve fibers, e: b, the dermis, or true skin ; f, blood vessels

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Keywords: ., bookcentury1900, bookdecade1920, bookpublishe, booksubjectbiology