Shared Flashcard Set

Details

Lecture 5
Skin and Appendages
36
Anatomy
Undergraduate 2
10/01/2010

Additional Anatomy Flashcards

 


 

Cards

Term
epidermis
Definition
-superficial
-composed of stratified keratin squamous epithelium
-30 to 50 cell layers
Term
dermis
Definition
-deep
-composed of CT ( fibroblasts, collagen, elastic fibers)
-blood vessels
Term
hypodermis
Definition
-loose CT and adipose tissue
-anchors skin to muscle
-shock absorber/insulator
Term
functions of skin
Definition
-protection
-thermoregulation
-absorption
-excretion
-synthesis
-sensation
-communication
Term
protection
Definition
-physical-impermeable
-chemical-acidity, melanin
-biological-Langerhans cells and macrophages
Term
thermoregulation
Definition
-body temp regulated by sweat glands and diameter of blood vessels
-hair/adipose tissue insulate
Term
absorption
Definition
-gases (CO2, O2)
-lipid soluble substances (vitamins)
-steroids
-plant resins, organic solvents, heavy metals
Term
excretion
Definition
urea, salt, ammonia, uric acid
Term
synthesis
Definition
exposure to sunlight aids in production of vitamin D
Term
sensation
Definition
contains receptors for touch, pain, temp
Term
communication
Definition
various emotions expressed through color changes
Term
epithelium layers
Definition
-stratum germinativum (basale)
-stratum spinosum
-stratum granulosum
-stratum lucidum
-stratum corneum
Term
stratum germinativum(basale)
Definition
-deepest layer
-single layer of cells
-undergo mitosis and gradually move to surface
Term
stratum spinosum
Definition
-several layers of squamous-like cells
-"prickle cells"
-attached by spine-like process
-keratin synthesis begins
Term
stratum granulosum
Definition
-cells contain dark granules
-abundant keratin
-cells begin to die
Term
stratum lucidum
Definition
-clear layer
-cells appear empty
-only found in thick skin
Term
stratum corneum
Definition
-superficial layer
-dead, scale like keratinized cells
Term
dermis
Definition
-CT (elastin, collagen fibers)
-macrophages
-mast cells
-nerve fibers
-blood vessels
-sweat glands
-hair follicles
-sebaceous glands
Term
2 layers of dermis
Definition
-papillary
-reticular
Term
reticular layer
Definition
-dense regular CT
-many elastin collagenous fibers
-provide skin tone, strength, resiliency
Term
function of dermis
Definition
-supporting base
-contains dense network of blood vessels for diffusion of nutrients to epidermis
Term
melanin
Definition
yellow, brown, black pigments protect against UV
Term
carotene
Definition
-yellow orange pigment
rich in vitamin A
Term
hemoglobin
Definition
iron containing pigment in RBC
Term
cyanosis
Definition
bluish coloration due to poor oxygen supply
Term
pallor
Definition
pale looking skin in anemia due to low hemoglobin
Term
skin tone
Definition
-strength and resiliency caused by elastic and collagenous fibers of the dermis
-wrinkles/stretch marks
Term
types of glands
Definition
sebaceous and sweat
Term
sebaceous glands
Definition
-type of holocrine gland (rupture to release)
-all over body except palms/soles
-very numerous along base of hair
-produce sebum
Term
sebum
Definition
-oily substance which lubricates the hair shaft
Term
secretion is stimulated by
Definition
hormones
Term
acne
Definition
inflammation of sebaceous glands
Term
sweat glands
Definition
-coiled, tubular with a duct which reaches the surface
-eccrine and apocine
Term
eccrine
Definition
-most numerous
-produce sweat of water, salt, waste
Term
apocrine
Definition
located in the axillary and anogenital regions
-secrete sweat and lipoproteins when acted upon by bacteria
Term
appendages of skin
Definition
-hair
-nails
-sebaceous glands
-sweat glands
-mammary glands
Supporting users have an ad free experience!