Chapter 5.4, Problem 18AYP

Summary Introduction

To write:

About the part of a hair where growth takes place, stages of hair growth, and whether all hairs grow at the same rate or not.

Introduction:

The existence of hair is a characteristic of mammals; if the hair is dense and covers most of the body surface, it is known as fur. In humans, hairs are present all over the skin besides the soles, the palms, the nipples, the lips, the distal sections of the toes and fingers, and parts of the external genitalia. The structure and color of a hair change with a person's growing ages.