How Humans Deal With And Survive Extreme Cold

 

https://www.coolantarctica.com/Antarctica%20fact%20file/science/cold_humans.php 

The body diverts blood flow from the surface as the temperature drops so the most important parts stay warm the longest. This allows the body's core to be protected for longer. If blood flow is gone from the extremities for too long, the cells start to die. Depending on the severity of the damage, new cells will either replace the old or that part of the body is lost to frost bite.

When We Are Cold:

• A reduction in body temperature results in impaired body function
• When you get cold, you want to pee
• Skin temperature falls below about 10°C, the surface blood vessels dilate (get wider) rather than constrict
• Horripilation (Goose bumps or pimples)
• increase of heat production (shivering)