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integumentary system

skin info

two parts of epidermis germinativum and stratrum corneum
makes new skin cells to replace old ones germinativum (stratum basale)
outermost/top layer that sheds constantly stratrum corneum
tough, leathery fibrous connective tissue, only part vascularized dermis (corium/true skin)
superficial fascia; mostly fat (insulates and absorbs shock) anchors skin to underlying structures subcutaneous (hypodermis)
barrier to suns UV rays, invasions of pathogens, holds moisture in and prevents deeper tissue dryness protection
sensory responds to pain, pressure, temp (hot/cold) & touch sensory protection
blood vessels help retain or lose heat body temperature regulation
(get larger) excess heat escapes through skin dialate
(get smaller) heat is retained in body constrict
help cool body through evaporation of perspiration sudorferous glands
tissues for temporary storage of fat, glucose, water, vitamins, and salts storage
located in subcutaneous fascia is source of energy adipose tissue
certain substances can be absorbed through skin absorbtion
skin medications transdermals
skin helps body eliminate salt, waste, excess water, and heat w/ perspiration excretion
vitamin D that matures in liver production
needs uv rays to form vitamin D
keratinized/dead epidermal cells that grow under the lunula(white protion) of nail bed nail
made of keratin hair
permanent hair lose alopecia
hair grows from hollow tube called follicle
protects from the skin hair shaft
embedded in the skin; shape determines whether hair is straight or curly root
melanin brown/black
carotene red/yellow
sweat glands; purpose is temperature regulation sudoriferous glands
type of apocrine gland, located under the ear, secrets ear wax(cerumen) ceruminous glands
oil glands; located all over the body except for palms and soles of feet; secrets sebum, oily substances; function:keeps hair and skin from becoming dry and brittle, slows water loss during dry weather subaceous glands
skin color pigmentation
absence of color pigment albino
reddish color caused by burns, congestion of blood vessels erythema
yellow discoloration caused by bile in blood as a result of liver or gallbladder ds jaundice
bluish skin caused by insufficient oxygen cyanosis
flat spots;freckles macules
firm raised;pimples papules
blisters;fluid filled; chicken pox vesicles
pus filled;acne pustules
dried pus/blood;scabs crusts
itchy elevated w/ irregular shapes;insect bites/hives wheals
deep loss of skin surface ulcer
inflammation of the sebaceous glands, occurs in adolescence acne culgaris
contagious fungal infection; itchy blisters crack and sores on feet, tx:antifungals athletes foot
grows slowly, basal cells in epidermis, pink-yellow lesions basal cell carcinoma
cancer that spreads quickly squamous cell carcinoma
most danger skin cancer, forms black sores melanoma
causes:tanning bed, irritating chemicals, and radiation treatment:surgical removal, radiation, chemotherapy skin cancer
inflammation of skin, caused by allergic reactions, poison ivy. sx: dry skin, erythema, itching, edema. tx:anti-inflammatory ointments dermatitis
noncontagious inflammatory ds caused by an allergic reaction, diet, cosmetics, soaps, and medications. sx: dryness, erythema, edema. tx: removing irriatant, corticosteroids eczema
highly contagious skin infection caused by strep and staph organisms. sx: erythema, ozzing vesicles, pustles. tx: wash w/ soap and water, antibiotics impetigo
chronic, noncontagious skin ds w/ periods of exacerbation(sx present) and remission(sx decrease) hereditary. sx: thick, red areas covered w/ white-silver scales. tx: coal/tar, cortisone cream, ultraviolet light, scale removal psoriasis
highly contagious fungal infections. sx: formation of a flat or raised circular area w/ clear central area surrounded by itchy, scaly crusty ring. tx: antifungals ringworm
wart caused by viral infection. sx: rough, hard, elevated, rounded, surface forms on the skin. tx: electricity, liquid nitrogen, acid, chemicals, laser verracae
Created by: emilyford