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Components of the integumentary system Skin Hair Nails Glands
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INTEGUMENTARY SYSTEM
skin
Components of the integumentary system
SkinHairNailsGlands
Skin is the human body’s largest organ
The #1 function of skin
PROTECTION
How Skin Protects the BodyBarrier against infection and
injuryHelp regulate body temperatureRemove waste productsProvide protection against UV
radiation from the sunProduce Vitamin D
Skin also transmits sensations like…PressureHeatColdPain
Cool facts about skin Waterproof Self-repairing Keeps germs and water OUT Keeps body fluids (like blood) and salts
IN Sweat is a way to get rid of unneeded
chemicals Skin is alive and renews the top layer
about once a month
Layers of the skin Top layer
Epidermis
Middle layer Dermis
Bottom layer Subcutaneous
layer
What is in the Epidermis?Epithelial TissueOuter layer of dead cellsMelanocytes
Produce melanin – a dark brown pigment (color)
Pores
What is in the Dermis?Living cellsBlood vesselsHair folliclesNerve endingsMuscles Glands
The Two Main Glands in SkinSweat glands
Release sweat to cool bodySebaceous (oil) glands
Keeps skin softWaterproof skinProtect against germs
Muscles in Skin???The tiny muscles attached to hair follicles cause “goose bumps” when they contract and pull the hair upright
What is in the Subcutaneous Layer???FatConnective tissueBlood vessels
The job of the subcutaneous layerTo cushion the body’s
internal organs from blows and bumps
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