WHAT’S CONTAINED IN ONE SQUARE INCH OF SKIN
The complex structures of the skin contained within one square inch:
• 65 hairs
• 9,500,000 cells
• 95 to 100 sebaceous (oil) glands
• 19 yards (17 meters) of blood vessels
• 650 sweat glands
• 78 yards (70 meters) of nerves
• 78 sensory apparatuses for heat
• 19,500 sensory cells at the ends of nerve fibers
• 1,300 nerve endings to record pain
• 160 to 165 pressure apparatuses for the perception of tactile stimuli
• 13 sensory apparatuses for cold
Adapted from Joel Gerson, Milady’s Standard Textbook for Professional Estheticians, eighth edition.