X A&P - Chp 6 - The Integumentary (Skin) Flashcards
Epidermis
outermost portion - epithelial cells and contains no blood vessels. nourished by capillaries in underlying dermis.
Dermis
framework of connective tissue and contains many blood vessels, nerve endings and glands.
Cross Section of Skin
see pic
Melanocyets produce
Melanin in the deepest layer of epidermis.
Dermal Papillae
finger prints, allow blood vessels to get closer to superficial cells.
Stratum Corneum
protective layer over finger prints.
Areas of great heat loss
Groin, Armpit (Axillae), Head
Subcutaneous Layer
aka Hypodermis/superficial fascia
connects skin to underlying muscles
made of loose connective tissue and large amounts of adipose
Integumentary
the name of the system that comprises the skin and all it;s associated structures.
Sebaceous Glands
saclike structures, oily sebum lubricates skin and hair and prevents drying.
Open into hair follicles
Sudoriferous (Sweat) Gland
coiled, tubelike structure located in dermis and subcutaneous tissue. Cool the body. release sweat or perspiratoin, draws heat rom skin as moisture evaporates at surface.
Eccrine
type of sweat gland diestributed though skin. exetnds directly to surface and opens at a pore. Sweat contains salt, minor excretory function
Apocrine
sweat glands located in armpits and groin area
Arrector Pili
this band of involuntary muscle attached to hair follicle.
Pallor
paleness of skin. reduced blood flow, reduction in hemoglobin, (anemia)
cyanosis
not enough oxygen in blood, skin takes on a blue hue
FLushing
redness of skin accompanied with high fever
Erythma
redness of skin
Macule
spot that is not raised or depressed. ie freckles
Papule
firm raise area, large firm papule is a nodule
Vesicle
blister or small fluid fliled sac