The Integumentary System Chapter 5
Cutaneous Membrane Epidermis Dermis Hypodermis
Functions Protection Excretion of Salts, water, waste Thermoregulation Melanin production Vitamin D production Detection/Sensation
Epidermis
Epidermal Pigmentation Carotene Melanin UV Radiation Vitamin D Epidermal Growth Factor
Dermis Dermal circulation/blood supply Supports epidermis Strength and elasticity Cleavage lines Innervation
Dermal Structures
Hair
Glands
Nails
Repair
Burns Rule of Nines Burn treatment Fluid and electrolytes Metabolic demands Infection Immune system
Aging Epidermal thining Dendritic cells decrease in number Decline in Vitamin D Melanocytes decline in activity Decrease in glandular activity Reduction in blood supply Hair follicle activity declines Thinning of dermis Fading of secondary sexual characteristics Slowing of repair
System Integration