Skin Flashcards
How long and how heavy is the skin?
3000sq.inch. And 6 to 9 pounds.
Dorsal skin
is on the back of the hand or foot
volar skin
on the palm or sole of the foot
2 m a i n d i v i s i o n s of the skin
- Epidermis
- Dermis
Epidermis
is the outermost and thinnest
layer of the skin. It contains no blood vessels
but has many small nerve endings.
dermis
is the underlying or inner layer of
the skin. = derma= corium = cutis = true skin.
This highly sensitive layer of connective tissue
is about 25 times thicker than the epidermis.
Within its structure, there are numerous blood
vessels, lymph vessels, nerves, etc
Epidermis layer: Stratum germinativum = basal cell layer = living
layer of epidermis
- Responsible for the growth, new
cells of epidermis. - Has melanocytes (dark skin pigment
melanin
– skin color and protect deeper layer)
Epidermis layer: Stratum spinosum – spiny layer
when the process of
shedding begins
Epidermis layer: Stratum granulosum=granular layer
cell dying here
Epidermis layer: Stratum lucidum
clear, transparent layer just under
the skin surface. Through these cells the light can pass.
Epidermis layer Stratum corneum=horny layer
- we see this layer,
- scale like cells continually being shed and replaced
- protect and water-resist
Dermis layer: Papillary
(under the epidermis)
papillae (elastic tissue); some have looped
capillaries; some – tactile corpuscles.
Contains melanocytes
Dermis layer: Reticular
(supplies the skin with
oxygen and nutrients). Fat cells, sweat
glands, blood vessels, hair follicles, lymph
vessels, arrector pili muscles – goose
bumps, oil glands, nerve endings
Pheomelanin
(red to yellow)
Eumelanin
(dark brown to black)
Collagen
Fibrous protein that
gives the skin form
and strength.
(wrinkles)
Elastin
A protein gives the
skin flexibility and
elasticity (regain the
shape after stretching
or expanding)
Oil glands
sebaceous glands
Sweat glands
sudoriferous glands
UVA
deeper than visible light, tan
UVB
not so
deep, sunburns and vitamin D
Vitiligo skin condition
Irregular shaped patches of skin depigmentation(hands, face and neck)
Milia
White heads
epidermal cysts
Chloasma
Patchy brown skin discoloration, often resume if hormonal changes pregnancy
Dandruff
Pityriasis capitis, can result from extreme changes in temperature, as a contact reaction to certain skin and hair care products, or as an allergic reaction to certain foods; it can be oily or dry
Subcutaneous/ Adipose
The fatty layer of the skin that creates softness and suppleness, is called
Carbuncle
Contagious, puss filled abscess, generally caused by bacterial infection
Cluster if boils
Boil
Small pus filled abscess
Wheal
Swollen lesion, lasting a few hours after insect bite
Nevus Flameus
Birthmark
Bromhidrosis
Foul smelling sweat
Leukoderma
Hypo(low) pigmentation in the skin, caused by a decrease in melananocyte activity. White patches on the skin
Verrucas
Warts
Blister
Herpes simples virus 1
Psoriasis
Non contagious skin disorder, characterized by red patches covered with white silky scales
skin cells turning over faster than normal
Scabies
Contagious disease, Itch mite
Tinea capitis
Ringworm is the scalp
Pediculosis capitis
Head lice
In a facial, high frequency current produces germicidal effects (good for acne),but it should not be used on the skin in excess of:
5 min
Vesicle(primary lesions)
Small blister or sac containing clear liquid(poison ivy, chickenpox, herpes)
Bulla(primary lesions)
a large blister containing a watery fluid, similar to a vesicle but larger
(burn contact dermatitis)
papule(primary lesions)
a pimple, a small circumscribed elevation on the skin that contains no fluid,
but may contain pus.
A _____ is a raised bump that is often red due to inflammation and sore due to the pressure of swelling.
Pustule(primary lesions)
an inflamed pimple containing pus
Cyst(primary lesions)
a closed , abnormally developed sac containing fluid or pus that is above or
below the skin
Tubercle(primary lesions)
an abnormal, rounded, solid lump above, within, or under the skin larger than papule
Tumor(primary lesions)
a swelling, an abnormal cell mass resulting from excessive multiplication of
cells that varies in size, shape, and color
Crust(Secondary lesions, Structure or beneath)
Dead cells while healing
Excoriation(Secondary lesions)
by scratching or scraping
Fissure(Secondary lesions)
crack
Scar=cicatrix(Secondary lesions)
mark after injury
Scale(Secondary lesions)
epidermal flakes (dandruff)
Ulcer(Secondary lesions)
mucous membrane after pus and
loss of depth
Hematoma(Secondary lesions)
collection of blood = bruise