Each hair follicle is attached to a tiny muscle (arrector pili) that can make the hair stand up. Many nerves end at the hair follicle too. These nerves sense hair movement and are sensitive to even the slightest draft. At the base of the hair, the hair root widens to a round hair bulb. Yes, hair is connected to blood cells through the hair follicle, which is nourished by blood vessels at its base. These vessels deliver nutrients and oxygen to the living cells in the hair bulb, enabling the hair