Next to each hair is a sebaceous gland which secrete sebum which lubricates the hair and provides each hair with an element of protection. If the sebaceous glands are overactive greasy or oily hair will result. If the glands are underactive dry hair may result including breakage.
Daily Hair Tip
Professional hairstylists often use a "rat" to create a full French twist or updo. A rat is a special form used to wrap hair around.