Hair follicles can't be pulled out. Pulling it out means that the hair is unhealthy. At the same time, the hair roots of young children are white, and the hair roots of middle-aged and elderly people are black.
Hair follicle is a kind of cystic tissue wrapped around hair roots. The inner layer is epithelial hair follicle, the outer layer is connective hair follicle, the inner layer is connected with epidermis, and the outer layer is connected with dermis.
Generally speaking, people can't grow new hair follicles. Hair follicles are skin cells that make hair grow. All hair follicles are born with people for life. Hair follicles cannot regenerate after death.
Hair follicle consists of hair shaft, hair process, hair bulb, hair nipple and hair matrix. Nerve fiber endings make hair follicles have sensory function, and arteriovenous capillary bundles provide blood for hair follicles. The deepest part of the hair follicle is the papilla located in the stratum corneum, which contains nerves and blood vessels and provides nutrition for the hair shaft.
The development of hair follicle is formed through a series of complex interactions between epidermis and dermis, which has periodicity.