POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
Polarised light micrograph of a human hair. This image shows the speckled appearance of the central region of the hair, the medulla. The medulla is contained by the cortex, which carries the colouration pigments. The outer shell of the hair is the cuticle. Magnification x200 at 35mm size.
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