hair follicle

A hair follicle is a small, tube-like structure in the skin from which hair grows. It anchors the hair securely and is rich in cells that produce keratin, the protein that makes up hair. The follicle connects to blood vessels and nerve fibers, providing nutrients and signals that regulate hair growth. Hair follicles go through cycles of growth, rest, and shedding, influenced by factors like hormones and health. They are found all over the body except on the palms of the hands and soles of the feet, playing a key role in hair production and skin health.