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Climatology and Climate Changes
Human Anatomy and Physiology

Does your blood thin in hot climates?


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Wiki User
January 24, 2010 9:20PM

Blood is thinner in a warm climate because:

More water is needed to be carried - when perspiration occurs, water is lost.

More electrolytes are needed in heat - lost from perspiration.

Body activity is higher in the warmer temperatures so more oxygen has to be carried: thinner blood requires less work to move it to extremities.

In a cold climate conservation of heat occurs and vessels contract reducing volume blood vessels can carry.