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INTEGUMENTARY SYSTEM
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  1. Chapter 5 INTEGUMENTARY SYSTEM

  2. FUNCTIONS OF THE SKIN • The skin has 7 functions: • Covers underlying tissues to protect against dehydration, injury, and germ invasion • Regulates body temperature • Helps manufacture vitamin D • Serves as the site of many nerve endings ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  3. FUNCTIONS OF THE SKIN • Temporarily stores fat, glucose, water, and salts • Screens out ultraviolet radiation • Absorbs certain drugs and chemical substances ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  4. STRUCTURE OF THE SKIN • Layers of the skin: • Epidermis - the outermost covering of epithelial cells with no blood vessels • Dermis - true skin made of connective tissue and is vascular • Subcutaneous (hypodermal layer) lies under the dermis and consists of loose connective tissue ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  5. STRUCTURE OF THE SKIN ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  6. APPENDAGES OF THE SKIN • Hair • Nails • Sweat Glands • Sebaceous Glands ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  7. THE INTEGUMENT AND ITS RELATIONSHIP TOMICROORGANISMS • Most skin bacteria are associated with hair follicles or sweat glands where nutrients and moisture are present • The best way to prevent disease is by washing the hands ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  8. Acne vulgaris Athlete’s foot Dermatitis Eczema Impetigo Psoriasis Ringworm Urticaria (hives) Boils Herpes Genital herpes Shingles (herpes zoster) REPRESENTATIVE DISORDERS OF THE SKIN ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  9. SKIN CANCER • Basal cell carcinoma is the most common and least malignant skin cancer • Squamous cell carcinoma occurs in the epidermis and grows rapidly • Malignant melanoma is present in pigmented cells called melanocytes ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  10. BURNS • Burns are the result of radiation from sun, heat, boiling water, steam, fire, chemicals, and electricity ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  11. BURNS • Classification of burns • First degree burns • epidermis • Second degree burns • epidermis and dermis • Third degree burns • destruction of epidermis, dermis, and subcutaneous ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  12. SKIN LESIONS • Pressure Ulcers (Decubitus) are the result of constant pressure against an area of tissue that lies over a bone ©2004 Delmar Learning, a Division of Thomson Learning, Inc.

  13. SKIN LESIONS • 4 Stages of pressure ulcers are: • Stage I - skin is red but unbroken • Stage II - blisters; broken or unbroken • Stage III - all layers of skin are broken • Stage IV - ulcerated area involves underlying muscles, tendons, and bones ©2004 Delmar Learning, a Division of Thomson Learning, Inc.