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长时间泡在水里会怎样
更新时间: 2020-11-06 00:00:00  

长时间泡在水里,人体为了避免散热过多,皮肤血管会出现保护性反射,使皮肤血管收缩。所以初下水时皮肤发白,等在水中游了一段时间,肌肉活动使皮肤血管扩张,血液循环加快,热量增加,皮肤由白变红,机体稍感暖和,这使人在水中可维持一段时间进行活动。

关键词: 时间 怎样

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