Burns Flashcards
Injures only epidermis, as in sunburn; redness, heat, inflammation. Healing takes days to weeks, no scarring
Superficial, partial-thickness (first degree)
Destroys epidermis and some dermis, as in burn from hot liquid. May blister, healing varies with severity and stem cell survival. Stem cells in hair follicles and glands can help regenerate skin. Usually recovers completely, no scarring
Deep, partial thickness (second degree)
Destroys epidermis, dermis, and accessory structures. Results from prolonged exposure to heat, flames, hot liquids. Some healing in margins. Often require skin graft/ skin substitutes
Full-thickness (third degree)
Originate from the epidermis extend into dermis and hypodermis
Accessory structures
Accessory structures of the skin include
Hair follicle
Nails
Skin glands (sweat and sebaceous)
Protective covering on ends of fingers and toes
Nails
Parts of a nail
Nail plate (body)
Nail bed
Nail matrix
Lunula
Cuticle
Visible portion keratinized cells overlies nail bed
Nail plate
Surface of skin under nail plate
Nail bed
Active growth region not visible at proximal end of nail bed
Nail matrix
Pale half moon shaped region that lies over nail matrix nail matrix conceals deeper blood vessels
Lunula
Folded at proximal end of nail part of stratum corneum that extends slightly over nail
Cuticle
Present on all surfaces of skin except palms, soles, lips, and nipples. Parts of external reproductive organs
Hair
Tube like depression of epidermal cells from which hair develops extends into dermis or the subcutaneous layer
Hair follicle
Extends from skin surface to dermis or hypodermis
Hair root