寒いと“鼻水が出る”のはなぜ？
雑学三昧
[{'start': '0.320', 'end': '6.960', 'text': "Why does your nose run when it's cold? It's not the wind"}, {'start': '3.439', 'end': '13.280', 'text': ".  It's the body's defensive reaction"}, {'start': '6.960', 'end': '17.439', 'text': '.  The moment you step outside on a winter morning, you may feel nauseous, and immediately'}, {'start': '13.280', 'end': '20.519', 'text': 'afterwards, a runny nose will form from the back of your nose,'}, {'start': '17.439', 'end': '23.560', 'text': "even though you haven't caught a cold. Why"}, {'start': '20.519', 'end': '27.599', 'text': 'does your nose get so runny in the cold?In'}, {'start': '23.560', 'end': '30.279', 'text': 'fact, this is a defensive reaction produced by your body to protect your nose and lungs from the cold and dryness.'}, {'start': '30.279', 'end': '37.480', 'text': 'When we breathe, air first'}, {'start': '34.160', 'end': '40.520', 'text': 'enters our body through our nose.  Inside your nose there'}, {'start': '37.480', 'end': '44.440', 'text': 'is a soft tissue called the mucosa, which'}, {'start': '44.440', 'end': '50.559', 'text': 'acts like a filter to catch airborne particles and viruses'}, {'start': '46.920', 'end': '54.840', 'text': '.  Even more importantly, it has the function of'}, {'start': '50.559', 'end': '58.960', 'text': 'circulating cold, dry air and adjusting the temperature and humidity to be gentle on the lungs'}, {'start': '54.840', 'end': '62.079', 'text': '.  For this function to occur, the nose'}, {'start': '58.960', 'end': '65.880', 'text': 'needs to secrete moisture, which is why runny nose is produced'}, {'start': '62.079', 'end': '69.520', 'text': '.  The cold, dry air'}, {'start': '65.880', 'end': '73.640', 'text': 'outside in winter is ideal for flowers because of the low temperature and low humidity. As a'}, {'start': '69.520', 'end': '77.439', 'text': 'result, flowers have to work'}, {'start': '73.640', 'end': '80.240', 'text': 'hard to excrete moisture every time cold air passes by, which results in'}, {'start': '77.439', 'end': '84.000', 'text': 'more runny noses.'}, {'start': '80.240', 'end': '87.640', 'text': "In addition, when it's cold, blood vessels tend to constrict and the"}, {'start': '84.000', 'end': '91.280', 'text': 'protective function of the membrane temporarily becomes a vase, which'}, {'start': '87.640', 'end': '94.640', 'text': 'can cause excess moisture to be released.  There is actually another'}, {'start': '91.280', 'end': '97.360', 'text': 'physical phenomenon.  When the'}, {'start': '94.640', 'end': '100.720', 'text': 'warm, sticky breath that comes out of the nose comes'}, {'start': '97.360', 'end': '103.799', 'text': 'into contact with cold air, the'}, {'start': '100.720', 'end': '108.600', 'text': 'water vapor around the nasal opening turns into droplets, which we'}, {'start': '103.799', 'end': '108.600', 'text': 'perceive as a runny nose.'}]