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skin structure
anatomy of skin
77
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Professional
07/15/2009

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Term
epidermis
Definition
outer most layer of the skin, AKA cuticle
-thinnest layer
-no blood vessels /has many small nerve endings
Term
stratum germinativum AKA basal cell layer
Definition
deepest layer of the epidermis
-produces new skin cells/ responsible for the growth
-also contains melanyocytes
Term
melanyocytes
Definition
they are special cells that make melanin
-protects the skin from UV Rays and they give the skin its color
Term
stratum spinosun
Definition
-above the statum germinativum.
-called the spiny layer
-starts the process of shedding skin cells
Term
stratum granulosum AKA granuler layer
Definition
it consists cells that look like granuals
-cells
this is the phase in which the cells are not yet shed but pushed up to the surface
Term
stradum lucidum
Definition
transparent or clear layer
Term
stratum cornium AKA horny layer
Definition
what you see when u look at me :) my skin. the most visible layer. the layer that you see.
-almost water proof
scale like cells that are constantly being shed and replaced
Term
keratin
Definition
it is a fiber protien that makes up hair and nails
Term
dermis
Definition
inner layer of the skin
other names include:
-derma

dermis has 2 layers
papilary recticular
-corium
-cutis
-true skin
highly sensitive layer of connective tissue
25 TIMES THICKER!! HOLY SHIT!
THAN THE EPIDERMIS!
inside is blood vessles, limph vesesles, nerves, sweat glands, oil glands, hair follicles, arrecto pilli muscle(causes goose bumps)
papillae
Term
papillary layer
Definition
the outer layer of the dermis
it is directly below the epidermis.
-contains small cone shaped elevations.
Term
tactile corpuscles
Definition
small epidermal structures with nerve endings that are sensitive to touch and pressure
Term
epidermal-dermal junction
Definition
the top of the papilary layer which joins the epidermis
Term
reticular layer
Definition
the deeper layer of the epidermis
-supplies the skin with oxygen and nuitriens
contains:
-fat cells, sweat glands, blood vessels, hair follicles, lymph vessels, arrector pili muscles, oil glands
Term
subcutaneous tissue
Definition
fatty layer below the dermis
Term
adipose or subcutis tissue
Definition
AKA fat tissue
Term
blood
Definition
it supplies nutrients and oxygen to the skin
Term
lymph
Definition
the clear fluid of the body that looks like blood plasma,
-contains colorless corpuscles,
surrounds the skin cells, and removes toxins and waste,
-helps protect the skin against waist
Term
motor nerve fibers
Definition
attached to the arrector pili muscles, and hair follicles
-causes goose bumps
Term
sensory nerve fibers
Definition
react to heat, cold, touch, pressure, and pain
Term
secretory nerve fibers
Definition
apart of the autonomic nervous system
-regulates sweating
-controls the flow of oil or sebum
Term
melanin
Definition
color of the skin
-protects skin against UV rays
Term
pheomelanin
Definition
red or yellow hair
-light skin
Term
eumelanin
Definition
black or brown hair
-dark skin
Term
collagen
Definition
a fibrous protein that gives skin form and strength
Term
elastin
Definition
forms the elastic tissue and gives skin its flexibility.
Term
sudoriferous glands
Definition
sweat glands
regulates body temperature and eliminates waste from the body
-controlled by the nervous system
Term
sebaceous glands
Definition
oil glands
oil glands are connected to the hair follicles and the oil lubricates the skin
there are no oil glands on the palms of the hands and the palms of the feet
Term
secretory coil
Definition
the coiled base of the sweat gland
Term
comedone
Definition
blackhead
a worm -like shaped of hardened sebum
Term
mila
Definition
white head
Keratin filled cysts.
-looks like sesame seeds.
Term
lentiginies
Definition
freckles
Term
lesion
Definition
it is a mark on the skin,
caused by injury
3 types of lesions:
primary
secondary
tertiery
Term
bulla
Definition
large blister with watery fluid
Term
vesicle
Definition
small bister with watery fluid
-caused by poisen ivy
Term
cyst
Definition
a large sac with fluid or pus that is above or below the skin
Term
macule
Definition
spot or discolor on the skin like a freckle.
neither raised or sunken
Term
papule
Definition
pimple
Term
pustule
Definition
infected pimple contained pus
Term
tubricle
Definition
abnormal rounded solid lump
Term
tumor
Definition
swealling abnormal cell mass.
resulting from excessive multiplications of cells
Term
wheal
Definition
ichy and swollen, bug bite
Term
Crust
Definition
Dead cells that form over a wound like a scab.
Term
Excoriation
Definition
Skin sore produced by scratching or scraping
Term
Fissure
Definition
A crack in the skin like chapped hands or lips
Term
Keloid
Definition
Thick scar from excessive growth of fibrous tissue
Term
Scale
Definition
Any thin dry or oil epidermal flakes like dandruff.
Term
Scar
Definition
Light colored slightly raised mark on the skin
-Caused by injury or lesion of the skin
Term
Ulcer
Definition
An open lesion on the skin with pus and loss of skin depth.
Term
Acne
Definition
skin disorder with chronic inflammation of the oil glands.
Term
Seborrheic Dermatitis
Definition
Skin condition caused by inflammation of the oil glands.
Term
Asteatosis
Definition
Condition of dry, scaly skin due to a deficiency of oil, caused by old age
Term
Rosacea
Definition
chronic condition appearing primarily on the cheeks and nose, redness.
Term
Steatoma
Definition
sebaceous cyst or fatty tumor.
aka a wen.
Term
Anhidrosis
Definition
Lack of sweat.
Caused by fever or certain skin diseases.
Medical treatment required
Term
Bromhidrosis
Definition
Foul-smelling sweat in the armpits or feet.
Term
Hyperhidrosis
Definition
Excessive sweating
Medical treatment
Term
Miliaria Rubra
Definition
Prickly heat, acute inflammatory disorder of the sweat glands
caused by exposure to excessive heat
Term
Dermatitis
Definition
inflammatory condition of the skin, comes in forms of vesicles or papules
Term
Eczema
Definition
inflammatory painful itchy disease of the skin. Acute or chronic. Dry or moist lesions. Not contageous.
Term
Herpes Simplex
Definition
Fever blister or cold sores
recurring viral infection
Blisters appear on lips, nostrils and other parts of the face.
Term
Psoriasis
Definition
Silver white scales usually found on the scalp, knees, chest and lower back.
Term
Albinism
Definition
Congenital leukoderma where absence of melanin is not present.
Term
Chloasma
Definition
Condition with increased pigmentation in spots that are not elevated.
Term
Leukoderma
Definition
light abnormal patches
caused by burns or congential disease that destroys the pigment-producing cells
aka: vitaligo and albinism
Term
Nevus
Definition
Birthmark
small or large malformation of the skin due to abnormal pigmentation or dilated capillaries.
Term
Stain
Definition
Wine-colored discoloration with a circular shape
occurs during aging or after certain diseases
Term
Tan
Definition
Change in pigmentation of skin caused by exposure to the sun or UV rays
Term
Vitiligo
Definition
milky-white spots of the skin
Term
Hypertrophy
Definition
Abnormal growth of the skin.
Many are harmless
Term
Keratoma
Definition
acquired, thickened patch of epidermis commonly known as a callus.
Term
Mole
Definition
A small brownish spot or blemish on the skin, ranging in color from pale tan to bluish black.
Term
skin tag
Definition
small brown or flesh colored out-growth of the skin
occurs mostly on the neck of an older person
Can be removed by a dermatologist
Term
Verruca
Definition
Technical term for wart.
Hypertrophy of the papillae and epidermis
caused by viral infection and is contageous
Term
Basal Cell Carcinoma
Definition
most common type of cancer and is the least severe. Characterized by pearly nodules
Term
Squamous cell carcinoma
Definition
More serious form of cancer and often looks like scaly red papules.
Term
Malignant Melinoma
Definition
Most severe form of skin cancer. Looks like black or brown patches on the skin and may look jagged or raised.
Term
Dermatitis Venata
Definition
aka: contact dermatitis.
Most common skin disease for nail technicians
You can become allergic to a product which is called allergic contact dermatitis
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