Anatomy of the Skin Flashcards
2 primary layers of the skin
epidermis and dermis
primary role of epidermis
protection and moisture retention
what is the epidermis comprised of
mostly dead cells
it is avascular;no blood supply
role of the dermis
Structural integrity of the integument
Provide nutrition/hydration to epidermis
Regulates body temp
what does the dermis contain
blood vessels nerves collagen lymphatics elastin Sebaceous glands sweat glands
what is the rete peg region
area between epidermal and dermal ridges and
valleys
role of the rete peg region
increases the surface area
between these 2 layers
Acts as extra skin to protect against frictional forces
What comprises the subcutaneous layer?
Connective tissue Fat-adipose tissue Blood vessels Lymphatics Nerves
What is the role of the subcutaneous layer?
Blood supply for skin
Provides insulation/cushioning
What is under subcutaneous layer?
Muscles, fascia and bone
What causes the Integument to lose it’s ability to be intact?
Impaired circulation Trauma Burns Pressure Friction Shear Radiation (including sun exposure) Edema Infection Loss of sensation Loss of moisture Skin disease
intrinsic factors that contribute to skin integrity
Age Chronic disease Oxygenation, blood volume Perfusion Immunosuppression from HIV, Chemo Neuropathy, SCI
extrinsic factors that contribute to skin integrity
Medications Nutrition Hydration Radiation and Chemotherapy Stress Infection
what part of the skin does a superficial wound involve?
involves the epidermis
what part of the skin does a partial thickness wound involve?
involves the dermis
what part of the skin does a full thickness wound involve?
Includes all layers of dermis and extends into
underlying tissues
examples of superficial wounds
First degree burns, stage 1 pressure
sores, contusions
examples of partial thickness wounds
Abrasions, skin tears, stage II pressure ulcers,
second degree burns
examples of full thickness wounds
Third degree burns, wounds that extend
through all layers of the skin and/or muscles,
tendons and bones
how can a superficial wound be identified
by redness, swelling, tenderness and warmth
NOT open
how does a superficial would heal
by the inflammatory response