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Skin

Skin Human Anatomy 232 Brown S14

TermDefinition
integumentary system skin or integument
dermatology study of dermis (skin)
Epidermis most superficial layer of skin; has 5 layers
Cutaneous membrane another name for integumetary
Stratum Basale deepest and only dividing layer of epidermis
Keratinocytes Keratin making cells
What is Keratin? Protein in epidermal cells of skin
What does Keratin do? Gives skin strength and makes the epidermis waterproof
Melanocytes transfer pigment granules into keratinocytes; give skin color
Melanosomes pigment granules in melanocytes
What is Thick Skin? palms, soles, and lips containing lucidum
What is Thin Skin? lacks lucidum
What is papillary layer? uppermost layer of the Dermis
Stratum Granulosum keratinization begins and waterproof barrier form to prevent fluid loss
Keratinization keratinocytes fill up with keratin
Hair shaft where hair extends from beyond the skin surface
Hair bulb where hair originates
Hair follicle an oblique tube that surrounds the root hair
Hair root hair within the follicle
Epidermal Dendritic (Langerhans)cell immune cells that help fight infection in the epidermis
What is outer most layer of the skin? Epidermis
Striae stretch marks caused by the by the tearing of collagen fibers
What is the Stratum Lucidum? layer only found in thick skin.
What layer is directly superficial the Stratum Lucidum? the Stratum Granulosum
Where is the dermis located and what does it consist of? Deep to the epidermis and consists of aerolar and dense connective tissue
Vitamin D3 Regulates calcium and phosphate
Calcitriol Promotes calcium and phosphorus absorption in small intestine
Stratum spinosom Several layers of polygonal keratinocytes, above Basale
Stratum corneum Most superficial layer, 20-30 layers of dead corneocytes
Dermis Deep to epidermis, contains areolar & dense connective tissue
Reticular layer forms the deeper and major portion of the dermis
Hypodermis Consists of areolar CT and adipose CT
Arrector pili muscle Produces goose bumps
Eccrine (merocrine) gland Tubular glands, release secretion on skin surface
Apocrine gland Glands release secretions into hair follicles
Sebaceous Discharge sebum
Ceruminous Forms earwax
Mammary glands modified apocrine glands that secrete milk
Free nerve ending Nerve not connected to sensory receptor
Root hair plexus Sends nervous impulses when hair moves
Tactile discs or cells epithelial cells that stimulate specific sensory nerve endings when distorted by fine touch or pressure
Krause bulb detect light pressure stimuli and low-frequency vibration
Ruffini corpuscle detect both continuous deep pressure and distortion in the skin
Pacinian corpuscle large receptors that detect deep pressure and high frequency vibration
Meissner corpuscle large, encapsulated oval receptors
Albinism deficency of melanin in skin genetic issue
Cyanosis condition of blue discoloration due to lack of oxygen
Erythema Redness of skin increased blood flow
Hematoma Collection of blood outside of a blood vessel (bruise)
Jaundice yellow discoloration of skin
Pallor Unhealthy pale appearance
Integument Skin that covers your body
Where are apocrine sweat glands found? Arm pits, nipple, groin, anus
What causes cyanosis? Low oxygen
Stratum Basale only dividing layer; makes keratin
Gangrene soft tissue necrosis due to lack of blood supply
What are the three types of Gangrene? Wet, Dry, and Gas
Created by: Dr Jay Brown
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