<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2012) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2012) (Learn how and when to remove this template message) </Td> </Tr> <P> The growth of human hair occurs everywhere on the body except for the soles of the feet, the lips, palms of the hands, some external genital areas, the navel, scar tissue, and, apart from eyelashes, the eyelids . Like skin, hair is a stratified squamous keratinized epithelium made of multi-layered flat cells whose rope - like filaments provide structure and strength to the hair shaft . </P> <P> Hair follows a specific growth cycle with three distinct and concurrent phases: anagen, catagen, and telogen phases . Each phase has specific characteristics that determine the length of the hair . All three phases occur simultaneously; one strand of hair may be in the anagen phase, while another is in the telogen phase . </P>

How long does a strand of hair last