Chapter 5, Problem 5.2.9AYLO

Summary Introduction

Interpretation:

The factor that accounts for the difference in hair color and texture is to be determined.

Concept introduction:

Hair is made up of keratin, hair follicles anchor hair into the skin and hair bulb make a base of the hair follicle.They are comprised of pigments that give a particularcolor to the hair. While the difference in the texture can be ascertained by the dissimilarity in the cross-section.

Hair grows from hair follicle and are mainly of three types;

• Downy hair:

  They are mostly present in the fetus, they have a low level of pigment.

• Vellus hair:

  Present at the time of birth downy hair change into vellus hair.

• Terminal hair: These are long and heavily pigmented.