Structure of hair and hair growth cycle notes pdf (B.Pharm cosmetic science)

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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-
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
Hair shaft- located above the epidermis