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University of Western Australia: Blue Histology
An excellent, in-depth examination of the integumentary system and its components. Includes many color microscopic images of these structures and more.
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Keratin.com: Hair Biology Index
This site, dedicated to hair information ranging from baldness to excess hair growth, explores the biology of hair. Contents includes a focus on the structure and function of skin and hair, hair follicle structure, ethnic differences in...