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The Integumentary (dermal) System provides...

Resistance to trauma and infection.

Protective barrier against pathogens. (this applies to the lashes keeping sweat/dust from the eyes & hairs in the nose preventing particulates from entering the lungs)

Vitamin D synthesis

Skin carries out 1st step of synthesis, liver/kidneys complete the process.

Sensation

To heat, cold, pressure, vibration, pain etc

Thermoregulation

Vasoconstricts to retain heat

Vasodilates to promote cooling. (In addition to sweating)

Nonverbal Communication

Facial expression

Appearance (can speak of self-image & emotional state)

Other functions

Prevents body from absorbing or losing water.

Prevents Ultraviolet radiation from penetrating to deeper tissue layers

Connectivity for underlying musculature.

Cushion for bones, muscle, organs.

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