Chapter 5.4, Problem 16AYP

Summary Introduction

To write:

The three layers of hair as seen in cross-section.

Introduction:

The existence of hair is a characteristic of mammals. If the hair is dense and covers most of the body's 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.