Experiment . . . "hands numbed by the cold " ! ! !
? ? ?
Prepare ice cubes, . . . pour them in a bowl full of cold water . . . leave for 5 minutes !
Dip one hand in ice water for several minutes and then dry it. What do you notice ? One hand is redder than the other. Due to the cold, the diameter of the blood vessels of the hand is reduced. The blood thus circulates more slowly in order to preserve the central part of the body from the cold. As soon as the hand emerges from the water, the diameter of the blood vessels increases letting the blood flow through again at once, making the hand redder. Did you know ? Human bodies immersed in water lower than its normal temperature (98,6 F) will see body temperature decline rapidly because the water is cold. ! ! ! We can, for example, already die in water at 54 F ! ! !
Experiment . . . "hands numbed by the cold " ! ! !
? ? ?
Prepare ice cubes, . . . pour them in a bowl full of cold water . . . leave for 5 minutes !
Dip one hand in ice water for several minutes and then dry it. What do you notice ? One hand is redder than the other. Due to the cold, the diameter of the blood vessels of the hand is reduced. The blood thus circulates more slowly in order to preserve the central part of the body from the cold. As soon as the hand emerges from the water, the diameter of the blood vessels increases letting the blood flow through again at once, making the hand redder. Did you know ? Human bodies immersed in water lower than its normal temperature (98,6 F) will see body temperature decline rapidly because the water is cold. ! ! ! We can, for example, already die in water at 54 F ! ! !
Experiment . . . "hands numbed by the cold " ! ! !
? ? ?
Prepare ice cubes, . . . pour them in a bowl full of cold water . . . leave for 5 minutes !
Dip one hand in ice water for several minutes and then dry it. What do you notice ? One hand is redder than the other. Due to the cold, the diameter of the blood vessels of the hand is reduced. The blood thus circulates more slowly in order to preserve the central part of the body from the cold. As soon as the hand emerges from the water, the diameter of the blood vessels increases letting the blood flow through again at once, making the hand redder. Did you know ? Human bodies immersed in water lower than its normal temperature (98,6 F) will see body temperature decline rapidly because the water is cold. ! ! ! We can, for example, already die in water at 54 F ! ! !