1	ANATOMY LECTURE SERIES 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
3	FUNCTIONS OF THE SKIN Temporarily stores fat, glucose, water, and salts Screens out ultraviolet radiation Absorbs certain drugs and chemical substances
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
5	STRUCTURE OF THE SKIN
6	APPENDAGES OF THE SKIN Hair Nails Sweat Glands Sebaceous Glands
7	THE INTEGUMENT AND ITS RELATIONSHIP TO MICROORGANISMS 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
8	REPRESENTATIVE DISORDERS OF THE SKIN Acne vulgaris Athlete’s foot Dermatitis Eczema Impetigo Psoriasis Ringworm Urticaria (hives) Boils Herpes Genital herpes Shingles (herpes zoster)
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
10	BURNS Burns are the result of radiation from sun, heat, boiling water, steam, fire, chemicals, and electricity
11	BURNS Classification of burns First degree burns epidermis Second degree burns epidermis and dermis Third degree burns destruction of epidermis, dermis, and subcutaneous
12	SKIN LESIONS Pressure Ulcers (Decubitus) are the result of constant pressure against an area of tissue that lies over a bone
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