Cosmetologists should study the properties of the hair and
scalp so that they can differentiate between normal and
abnormal hair loss, offer a variety of chemical services to
clients, and aid a client in caring for their scalp and hair well-
being.
Trichology- study of hair and its diseases and care.
Structure of the Hair
Human hair is divided into two parts:
(“epi”- means above or outer; “derm”- means skin so
epidermis is the OUTER layer of skin)
Hair root (roots are underground)- located below the
epidermis
Hair shaft- located above the epidermis