List the functions of the skin.

Skin functions:
-Protective. The skin acts as a barrier, protecting the body from mechanical stress and bacteria.
– Thermoregulatory. Helps maintain optimal body temperature.
– Immune.
– Excretory. Participates in water-salt metabolism.
– Performs the function of a sense organ.
– Produces vitamin D.
– Participates in breathing.
– Blood depot.

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