Skin Flashcards
What is the skins main functions?
Protection
Excretion
Maintaining body temperature
Senses
What are the 4 tissue types ?
Epithelial, Connective, muscles and nervous
Layers of the skin?
Epidermis
Dermis
Hypodermis
Layers of the epidermis ?
Stratum Corneum Stratum lucidium ( only in thick skin ) Stratum granulosum Stratum spinosum Stratum basale Stratified squamous columnar epithelium
Accessory structures of the skin
Hair - shaft, follicle, arrestor pili muscle, sebaceous gland
Sweat glands - eccrine, apocrine
Receptors - Tactile, lamellar and bulbous
Nails - protection and sensation
Mole vs freckle
Mole = cluster of melanocytes ( bottom of the epidermis ) Freckles = Melanocytes over producing melanosomes ( on the epidermis )
Tattoos
Dermal layer ( not shed )
Free nerve ending skin receptors
Respond to temperature, pain, movement and pressure
Tactile ( Merkel ) discs Skin receptors
Located in deepest layer of epidermis
Communication
Good for two point discrimination
sensitive to physical features - texture shape and edges, fine touch and light pressure
Tactile ( meissner ) corpuscles Skin receptors
Located in papillary layer of dermis
Encapsulated
Sense delicate fine touch,, light pressure and vibration
Lamellar ( pacinian ) corpuscles Skin receptors
Deep in dermis and hypodermis
senses deep pressure and vibration
Bulbous corpuscles Skin receptors
Dermis and subcutaneous tissue
Senses deep pressure and stretching or distortion
How do we regulate our body temperatures?
Radiation, conduction, convection and evaporation
Sweating - eccrine,
Heat generating - Shivering, Non-shivering thermogenesis, Thyroxine
Degrees of burns
First - outer layers of epidermis, no blisters, 3-10 days
Second - epidermis and varying amounts of dermis, painful and blistered, can include whitish waxy areas, 1 week - 1 month
Third - Full thickness, dry and leathery, scarring etc
Burn complications
Dehydration
Hypothermia
renal failure
respiratory dysfunction
