Wound Assessment Flashcards
(16 cards)
discuss the skin
largest organ - 15% of total BW
external covering of body
3 layers of skin
epidermis
dermis
hypodermis - subcutaneous tissue and superficial fascia
layers of epidermis
stratum corneum - dead keratinocytes; waterproofing
stratum lucideum - translucent cells; palms and soles
stratum granulosum - cells of Langderhans; water retention
stratum spinosum - keratinocytes and Langderhands; protective later
stratum basale - single layer of epidermal cells’ melatinocytes
function of epidermis
outermost - protects from external pathogens
evaporation of sweat
function of dermis
blood vessels, sweat glands and hair follicles
thicker than epidermis
function of hypodermis
connects skin to bones and muscle
how does acid mantle of skin protect
acid mantle - 4-6.5 pH
from oil and sweat
inhibits bacterial growth
refers to lack of fluids in the body
hypovolemic shock
how does defensins of skin protect
anti-microbial peptides or proteins - immunomodulatory and chemotactic
direct membrane destruction or bacterial growth
how does moisture barrier and water retention of skin protect
helps healing and homeostasis of fluids
prevents hypovolemic shock
how do cells of langerhans provide immunity
first line of defense in wounds - immune cells
has tissue resident macrophages - adaptive immune response to foreign substances
how do macrophages provide immunity
WBC
how do keratin cells provide immunity
produce IL1 - signals if there is wound
primary cell in skin - maintains health and aids inflammatory process
discuss thermoregulation of skin
blood reservoir: 8-10% of circulation
vasodilation to cool down
vasoconstriction to conserve heat
evaporation of sweat cools down body
discuss sensation of skin
free nerve endings, meissner, pacini
