Francis M. Walters, Physiology and Hygiene for Secondary Schools
“ A Hair is a slender cylinder, formed by the union of epidermal cells, which grows from a kind of pit in the dermis, called the hair follicle. The oval and somewhat enlarged part of the hair within the follicle is called the root, or bulb, and the uniform cylinder beyond the follicle is called the shaft. Connected with the sides of the follicles are the oil, or sebaceous, glands (Figs. 121 and 122) . These secrete an oily liquid which keeps the hair and cuticle soft and pliable. ”
