|MadSci Network: Medicine|
When humans are exposed to the cold, our bodies initially try to adapt and protect the most important organs which include the brain, heart, liver and kidneys. The arms and legs although blood continues to circulate through the large blood vessels, the smaller ones will constrict again to conserve body heat and the internal organs. With time the body temperature decreases, there are changes in the blood pH and the human will also start to "shutdown". People with hypothermia will become more confused and disoriented and then unconscious. With time all organs will shutdown, and if no revival efforts- death occurs. Sometimes when people who have been out and appear "frozen", there may be attempts to rewarm the person and occasionally this does revive the person.
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