Magnified Surface of a Hair
The hair is produced by a peculiar growth and modification of the epidermis. Externally it is covered by a layer of fine scales closely imbricated, or overlapping like the tiles of a house, but with the free edges turned upwards. It is called the cuticle of the hair. Shown in the magnified surface of a hair. The wave lines mark the upper or free edges of the cortical scales. B, separate scales.