<prompt> The growth phase of hair isTelogenAnagenMetagenProgen  <response>: Anagen: 1242- Davidson 21st edition Hairs in humans do not grow continuosely but in a cycle with three phases Anagen, in which the hair grows Catagen a transitional phase Telogen a resting stage The individual duration of the components of the cell cycle varies by site On the scalp, anagen will last several years, whereas catagen lasts only a few days and telogen around 3 months Highest density of hair follicles is on the scalp, which has between 500 and 1000cm2 