Ultraviolet The sun sends beams which we see light to the earth, and beams which we do not see thermal and ultraviolet.

Thermal infrared, and also visible beams of the sun render on a body the warming influence.

They cause expansion of the smallest blood vessels of skin.

To the weakening action of sunshine the uncountable nervous terminations located in skin are exposed.

Ultraviolet rays have other effect on an organism.

Under them influence many species of bacteria especially gnoyerodny, usilivaperish growth of bones at children etsyatsya, the metabolism improves.


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