Ch 5 Integumentary System

INTRODUCTION

Dermatology-Specialty dealing with

most skin disorders and diseases

Primary Care and Urgent Care often see

• Rashes

• Burns

• Nail Trauma

• Moles of Concern

ANATOMY OF
INTEGUMENTARY
SYSTEM

•Skin
•Hair
•Nails
•Skin glands

3

SKIN: A MEMBRANE

EPITHELIAL

3 TYPES
1 MUCOUS

2 SEROUS

3 CUTANEOUS

CONNECTIVE

COVERS ORGANS

LINES JOINTS

EPITHELIAL

Mucous-body cavities, secretes mucus

Serous- covers organs not open to outside

of body, secretes serous fluid

Cutaneous- membrane of skin, secretes

sebum

CUTANEOUS

MEMBRANE

3 Layers
• Epidermis
• Dermis
• Subcutaneous

Integumentary

6

ACCESSORY ORGANS

7

GLANDS-Sudoriferous & Sebaceous

Sudoriferous-sweat glands

2 types of sudoriferous-apocrine and eccrine

Sebaceous-oil glands

Exocrine-excrete through a duct

HAIR & NAILS

Hair

Tightly fused dead protein cells filled with

keratin

Protection

Function to maintain heat through holding a

layer of air as insulation near the body.

Nails

Keratin plate at finger and toe tips

Protect phalanges

Function to protect dorsal bone tips

FUNCTIONS

Protection

Temperature Regulation

Receptor for touch

Excretion

Helps synthesize Vitamin D

BODY

TEMPERATURE

Maintained by 2 processes working together

Heat production and Heat loss

• 5 methods the body loses heat-

convection
conduction
radiation

evaporation
elimination

QUESTIONS?