Mole hunt

摘要

I have a mole out of which hairs grow much longer than in the surrounding skin. Why do some moles promote longer hair growth?There is more to hair growth than meets the eye. An eyelash, for example, is a marvel of programmed curvature, texture, colour, thickness, length andrnpersistence. The hairs on a porcupine are a microscopic and macroscopic tour de force. Even the growth of simple human body hair requires elaborate control of tissues in the papilla at the base of the follicle from which any hair sprouts. Such control demands interaction with surrounding cells and the body's hormones.