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31 Cards in this Set

  • Front
  • Back
Functions of skin
Protection
Body temp regulation
Cutaneous sensation(respond to touch, pressure & pain.
Metabolic functions
Blood reservior
Excretion (sweat)
Layers of Epidermis
Stratum Corneum
Stratum Lucidium
Stratum Granulosum
Stratum Spinosum
Stratum Basale
Dermis
Stratum Corneum
Top layer
Flat membraneus sacs filled w/keratin
Dead cells
15 - 30 layers
Stratum Lucidium
Shiny Layer
Stratum Granulosum
Grainy kerotin cells flatten
3-5 layers
Stratum Spinosum
Thick bundles of intermediate filaments of pre keratin
Pricky Layer
Several layers of Langerhan Cells
Stratum Basale
Deepest layer
Germinating layer
Merkel Cell
Many mitotic nuclei
Melanocytes
Dermis
Ridges: increase of surface area
Finger prints
gripping w/ finger prints
What does the Epidermis contain?
Keratinocytes - produce keratin held by desnosomes

Melanocytes - Melanin pigmanet protects nucleus

Langerhan Cells - immune System cells (move & eat pathogens)

Merkel Cells - Sensory structures of touch (Spikey Cells)
Dermis Layers
Papillary Layer

Reticular Layer
Papillary Layer
Thin superficial, areolar conective tissue, Meissner's Corpuscles (detect light touch: no hair)
Reticular Layer
80% Thickness of dermis
Very vacularized
Deepest layer
Accessory structures (hair follicles)
Glands
Pascinian Corpuscles: Detect deep pressure: onion shaped
Dermis
Houses sensory structures
Dense irregular connective tissues
All 3 conn. tissue fibers: fibroblasts, collegan & elastic fibers
Hypodermis
(Superficial Fascia)
Insulation, Cushioning, Energy storage, temp. regulation, Large collection of Adipose, Very vascularized, ADIPOSE (fat), AREOLAR
Melanin
Hair gets color from
brownish-black
protect nucleus in base cells
Carotene
Yellow-orange pigment in certain plants (carrots)
Accumulate in STRATUM CORNEUM & fatty tissue of hypodermis
Palms, Soles & Heels
Hemoglobin
Pinkish
Underlying blood
Keratinization
(Cornification)
Conversion of Squamous epithelial cells into horny materials such as nails

Occurs in Epidermis
Hair
Protect & Insulates body
Nails
Scalelike modification of epidermis on distal, dorsal surface of fingers & toes
Thick layers kerotin
Glands
Modified cubutial Epithelial Cells
1 or more cells makes & secretes an aqueous fluid

Classified by site of product release: Endocrine - no ducts & Exocrine - ducts, sweat glands

Relative # of cells forming the gland unicellular or multicellular (globlet cell)
Hair Follicle
Fold down from Epidermis into the Dermis

Shaft protects from skin
Arrector pili
Pull follicles into upright position & produces Goosebumps
Sebacceous Gland
All over body except palms & soles

Lubricates the hair
Vellus
Peach fuzz

Fine & Light
Terminal Hair
Thick & dark

Head, Eyebrows, Pubic
Sebacceous Glands
Oil Glands
Hologen secretion mode (cells burst)
Produce sebum (oil)
Keeps hair functional
Active @ puberty - targeted by androgen hormones
ECCRINE GLANDS
(Type of Sweat Gland)
99% H2O & Salts
All over Body
Temp Regulated
2.5 million per person
Slightly Acidic
RESPONSE TO AUTOMATIC NERVOUS SYSTEM (ANS)
APROCRINE GLANDS
(Type of Sweat Gland)
Androgen Hormones (@puberty)
Release H2O, Salts & Lipids
Pubic regions
Nitrogen based wastes (proteins)
Axillary
Odorless & Colorless
CERUMINOUS GLANDS
(Type of Sweat Gland)
Ear produce cerumen (ear wax)
Lipid based
Acidic
To deter insects
MAMMARY GLANDS
(Type of Sweat Gland)
Modified APOCRINE sweat gland

Targeted by: Prolactin & Oxytocin