The development of human hair happens wherever on the body aside from the bottoms of the feet, the lips, palms of the hands, some outside genital territories, the navel, scar tissue, and, aside from eyelashes, the eyelids.Hair is a defined squamous keratinized epithelium made of multi-layered level cells whose rope-like fibers give structure and solidarity to the hair shaft.
The protein called keratin makes up hair and animates hair development.
Hair follows a particular development cycle with three unmistakable and simultaneous stages: anagen, catagen, and telogen. Each stage has explicit qualities that decide the length of the hair.