Presented by:

Joel G. Soria, MD

This chapter relates the structure and

function of the skin, and associated glands, nails, and hair.

The use of the integumentary system as a diagnostic aid and the functions of the skin are discussed.

The chapter also presents important corollary topics, such as skin color, burns, diseases of the skin, and effects of aging on the skin.

Chapter Overview

Functions of the Integumentary System

Describe the functions of the integumentary system.

Hypodermis

Describe the structure and discuss the function of the hypodermis.

Skin

Describe the structure and function of the dermis and epidermis.

Define the epidermal strata and relate them to the process of

keratinization.

Explain how melanin, blood, collagen and carotene affect skin color.

Outline and Objectives

Accessory Skin Structures

Describe the structure of a hair and discuss the phases of hair growth.

Name the glands of the skin and describe the secretions they produce.

Describe the part of a nail and explain how nails grow.

Physiology of the Integumentary System Discuss the functions of skin, hair, glands and nails.

The Integumentary System as a Diagnostic Aid Explain how the integumentary system can be used as a

diagnostic aid.

Outline and Objectives

Burns

Classify burns on the basis of the amount of skin damage they produce.

Skin Cancer Name and define the types of skin cancer.

Effects of Aging on the Integumentary System List the changes the integumentary system

undergoes with age.

Outline and Objectives

I. Functions of the Integumentary System

A. ProtectionB. SensationC. Vitamin D productionD. Temperature regulationE. Excretion

II. Hypodermis (subcutaneous tissue)A. Loose connective tissueB. Fat

A. Dermis

1. Cleavage lines

2. Striae

3. Dermal papillae

B. Epidermis

1. Stratum basale

2. Changing cell layers

3. Stratum corneum

a. callus

b. corn

Figure 5.3a

1. Pigments (melanin) in the skin

2. Thickness of the stratum corneum

3. blood circulating

Skin color

A. Hair1. Anatomy2. Growth

B. Arrector pili musclesC. Glands

1. Sebaceous glands2. Merocrine sweat glands3. Apocrine sweat glands

D. Nails1. Anatomy2. Growth

Figure 5.7a

VII. Burns