BY: EMILY WU WILL FREDER ISABEL STEINTHAL KRISTIAN CUNNINGHAM

INTEGUMENTARY SYSTEM Also known as skin!

FUNCTIONS Acts as protection Sensation (sense of touch) Heat regulation Control of evaporation of body fluid Storage for water and lipids (molecules; fats, vitamins) Absorption (oxygen, nitrogen, carbon dioxide) Water resistant

MAMMALIAN SKIN LAYERS Epidermis (top layer) Dermis (bottom layer)

EPIDERMIS Divided into strata or layers Stratum corneum Stratum lucidum (only in palms and soles) Stratum granulosm Stratum spinosum Stratum germinativum (also called stratum basale) Contains no blood vessels Waterproofing and blocking infection

BASEMENT MEMBRANE Separates epidermis and dermis Thin sheet of fibers Controls traffic of cells and molecules

DERMIS Consists of connective tissue and cushions body from stress and strain Contains nerve endings, hair follicles, sweat glands, other glands, blood vessels, ect Two layers/areas Papillary region Reticular region

HYPODERMIS NOT a part of skin Connects skin to muscle and bone

MELANIN Melanin gives skin its color, the darker your skin is the more melanin you have When you go in the sun, the cells make extra melanin to protect you from getting burned by the suns UV rays

HAIR Develops from the epidermis Made of threads of cells that develop from the epidermis and cover most of the body Each hair has a medulla, cortex, and cuticle. The medulla in the center contains soft keratin and air The cortex (innermost and thickest layer) has the pigment that gives hair color The cuticle (the outermost layer) has cells that overlap like scales

NAILS Develop from the epidermis Parts of the nail are the lunula, cuticle, nail plate, free edge, and root Luluna is the white half-moon shaped part of the base Cuticle is where the nail meets your skin Nail plate, or body, is the actual nail Free Edge is the white part at the tip Root is hidden under skin folds

SYSTEMS SKIN WORKS WITH Circulatory System- capillaries near skin surface open to cool off your body and close to conserve heat Immune System- skin releases fluid to kill bacteria Nervous System- neurons in skin senses world around you Muscular System- skin covers and protects Skeletal System- covers and protects

DEFECTS OR DISORDERS The most common are: Acne Eczema Seborreheic Dermatitis Skin Cancer Psoriasis

ACNE LOTS of pimple Happens when passageway from skin’s pores to oil glands become clogged

ECZEMA Super dry, flaky skin Usually born with it, but you can develop it from REALLY dry skin or irritantation

SEBORREHEIC DERMATITIS Oily, waxy patches Runs in families

SKIN CANCER Most common are Basal Cell Carcinoma and Squamous Cell Carcinoma Deadliest is Melanoma Usually from to much UV radiation from the sun

PSORIASIS Build up of excess skin tissue that looks red and thick, and is covered with silvery scales Genetic disorder

GERNERAL INFORMATION Every minute of the day we lose about 30,000 to 40,000 dead skin cells off the surface of our skin 95% of the cells of your epidermis work to make new cells, the other 5% work to make a substance called melanin

FUN FACTS Integument means “covering” Your skin is one of (if not THE) largest organ Every month you have a whole new layer of skin You will shed 40 pounds of skin in a lifetime The average adult has 20 square feet of skin Your eyelids have the thinnest skin Goose bumps are little pimples that help retain a layer of warm air over our body The body has about 3,000,000 sweat glands You sweat 30 gallons a day

WORKS CONSULTED "10 Interesting Facts-Integumentary System." Google Sites. Google, n.d. Web. 27 Feb Dowshen, Steven, MD. "Your Skin." Kids Health. N.p., n.d. Web. 27 Feb "Integumentary System." Integumentary System. N.p., 18 May Web. 27 Feb Skin (Integumentary) System Info." Body Guide. A.D.A.M, n.d. Web. 28 Feb < "Integumentary System." Wikipedia. N.p., 23 Feb Web. 27 Feb

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