Chapter 5 study guide Flashcards
funtions of skin
resistance to trauma and infection
water retention
vitamin D synthesis
Sensation
Thermoregulation
non-verbal communication
resistance to trauma
infection
due to the tightly packed cells few organisms can penetrate
water retention
the skin prohibits water absorption and water loss
Vitamin D synthesis
carries out first step in synthesis
Sensatoin
high concentrations of nerve endings that react to external stimuli
thermoregulation
nerve endings monitor skin temp and signal the body to react to cold or hot
non verbal communication
facial movements allow for many facial expressions
epidermal layers
Stratum corneum
Stratum Lucidum (only in think skin)
Stratum granulosum
Stratum spinosum
Stratum basale
derma layers
papapillary layer (superficial)
reticular layer (deep)
hypodermis
mainly adipose tissue
allows connection to muslces, and other underlying tissue
sudoriferous gland
located in the epidermis
2 types
merocrine
most numorous, perspire to cool body
apocrine
ducts to hair follicle
sweat is thicker and more fatty acids
assoc with sex pheromones
sebaceous glands
produce oily sebum
usually open into the hair follicle
keep skin and hair from becoming brittle
ceruminous
found in auditory canal
excretes cerumen
keeps eardrum pliable
waterproofs canal
kills bacteria
coats guard hairs
3 types of skin cancer
basal cell carcinoma
squamous cell carcinoma
malignant melanoma
basal cell carcinoma
most common
least dangerous
hardly metastisizes
