In what part of the hair follicle does hair growth occur?

Hair growth occurs in the hair bulb, which is located at the base of the hair follicle. This structure is responsible for producing new hair cells, which are created through the process of keratinization. As these cells are formed, they push older cells upward, leading to the formation of the hair shaft that extends out of the scalp. The hair bulb is crucial because it contains the matrix of cells that divides and proliferates, enabling hair growth to take place.

Additionally, the hair bulb is surrounded by the dermal papilla, which supplies the hair bulb with necessary nutrients and oxygen through the blood vessels it contains. While the hair root is the part of the hair that is beneath the surface of the skin and connects the hair bulb to the follicle, it is the hair bulb itself that is specifically responsible for the production of hair.