Compléter Ch 11 Properties of Hair & Scalp (D)Version en ligne Chemical Composition par Shawanna Whidbee 1 follicle composed protein originating Hair is of that grows from cells within the hair . 2 cells keratinization maturation The of these is called . 3 elements skin five COHNS nails elements Together , the that make up human hair are referred to as the to help people remember them ; they are also found in the and the . 4 heat broken link hydrogen bond dries water cross A is a weak , physical , - side bond that is easily by or ; these bonds reform when the hair . 5 side bonds polypeptide salt bonds Weak , physical , cross - linked between adjacent chains are . 6 chemical bonds waves relaxers disulfide permanent The hairs strongest side bonds ; are broken through and . 7 Pheomelanin pigment Eumelanin Melanin are the tiny grains of in the cortex that give natural color to the hair ; and . 8 shape extremely wave wavy curly pattern straight The of hair refers to the of the hair strand and is described as , , , or curly . 9 curl extremely curly African varying anyone Asian straight Native extremely and Americans tend to have hair , while American ? s tend to have hair ; however of any race , or mixed race can have hair with degrees of . 10 curly low often elasticity Extremely hair has .