Integumentary System

“The PROTECTOR!!!”

Functions of the Integumentary System:

Protects internal organs/systems Protects against infectious organisms Prevents loss of body fluids Regulates body temperature Removes wastes – perspiration Generates Vitamin D – Sunlight Protects against sunburns Stores fat for fuel and insulation Sensory organ w/ receptors for touch,

pressure, pain, heat, and cold

Parts of the Integumentary System

1.SKIN2.HAIR3.NAILS

***All form from dead cells which the body sheds as new cells push up from underneath.

skin

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1. Epidermis: Outside Layer Produces Melanin--- Gives skin

its color and protects us from UV rays.

Made up of keratin (protein)

2. Dermis: Contains nerve endings,

blood vessels, hair follicles, sweat glands, oil glands.

3. Subcutaneous: Made of fat and keeps us

warm. Holds skin to tissues Hair starts here.

Nails

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Protects fingers and toes Formed from

keratin(protein) and are tough and plate-like

No nerve endings Grow 1/10 of an inch per

month

HairClick icon to add picture

Each hair grows out of a follicle

Hairs are large columns of dead cells which are filled with protein called keratin

Hair color is determined by amount of melanin in skin

100,000 follicles on your head