Med Term - 12: Integumentary System Flashcards
What are the functions of the integumentary system?
THINK DERMA
D vitamin synthesis
Elimination of waste via sweat
Regulation of temperature via sweat
Makes external stimuli available to brain
Acts as a barrier to moisture loss, microbes, UV light
Scleroprotein
Hard protein
Insoluble in most solvents
In embryology, dermatome means
Layer in embryonic development that gives rise to dermal layers of skin
In surgery, dermatome means
Instrument used to cut thin slices of skin for grafting
In anatomy, dermatome means
Skin surface area supplied by nerves
C, T, L, S
What are the accessory skin structures?
Hair
nails
Sebaceous glands
sweat glands
Another name for sweat glands are?
Sudoriferous glands
What is a skin lesion?
Any localized abnormality of the skin
also includes swelling, changes of shape
What is the benign skin lesion often found in older patients?
Seborrheic keratosis
What are the main structures of the skin?
epidermis
dermis
Characteristics of the epidermis
avascular
thin upper layer
Characteristics of the dermis
vascular
thick lower layer
hair follicles, nerves, glands, finger-like projections that create fingerprints
Characteristics of the very top layer of the epidermis?
dead
keratinized
sheds constantly
Keratin is also known as what type of protein?
scleroprotein
What causes the erection of hair on the skin?
pilomotor muscles
What is the origin of the skin in embryonic development?
ectoderm
What are the two types of lesions?
primary
secondary
Primary Lesion
initial reaction to an underlying problem that changes the structural components of the skin
Circumscribed lesion
lesion that is well defined
circle can be drawn around it
Verucca
benign warty skin caused by virus
What is the most common type of verucca?
Herpes Simplex Virus (HSV)
What are the two most common types of HSV?
HSV-1 = fever blisters
Herpes zoster = shingles
Cyst
sac filled with fluid or semisolid matter
Nodule
solid lesion more than 1 cm deep
What is the difference between a cyst and a nodule?
cyst is fluid filled and a nodule is solid
Macule
nonraised
discolored spot
FRECKLE
Papule
raised lesion
< 1 cm
MOLE
What is the difference between a macule and a papule?
a macule is nonraised and discolored
papule is raised
Plaque
elevated
circumscribed patches
>1 cm in diameter
Vesicle
blister less than 1 cm
Bullae
blister more than 1 cm
What is the difference between a vesicle and a pustule?
vesicle is filled with clear fluid and a pustule is filled with pus
Pustule
vesicle filled with cloudy fluid or pus
What are the types of primary skin lesions? (9)
bullae vesicle pustule macule papule wheal plaque nodule cyst
Wheal
elevated
irregularly shaped
seen in urticaria / HIVES
Secondary Lesion
changes in appearance of primary lesion
What are the types of secondary lesions? (4)
atrophy
ulcer
fissure
scales
Atrophy
thinning of skin
stretch marks
Ulcer
deep
irregular
erodes into dermis
Fissure
cracks in epidermis
athletes foot
Scales
dried pieces of shed epidermis
white, irregular in size and shape
What are the different types of injury to the skin? (6)
laceration incision puncture burn abrasion contusion