{"id":15748,"date":"2022-06-08T13:42:37","date_gmt":"2022-06-08T05:42:37","guid":{"rendered":"http:\/\/www.gocpmall.com\/?p=15748"},"modified":"2022-06-08T13:42:37","modified_gmt":"2022-06-08T05:42:37","slug":"nasa%e8%a7%a3%e9%87%8a%e5%a4%aa%e7%a9%ba%e7%8e%af%e5%a2%83%e5%af%b9%e5%ae%87%e8%88%aa%e5%91%98%e8%a1%80%e6%b6%b2%e6%b5%81%e5%8a%a8%e7%9a%84%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"https:\/\/www.gocpmall.com\/?p=15748","title":{"rendered":"NASA\u89e3\u91ca\u592a\u7a7a\u73af\u5883\u5bf9\u5b87\u822a\u5458\u8840\u6db2\u6d41\u52a8\u7684\u5f71\u54cd"},"content":{"rendered":"

\"news
访问： 阿里云6月“云上特卖”活动上线 赢取最高500元代金券 在地球上，重力将血液和其他体液拉到腹部和腿部。这就是长时间站立会导致腿和脚踝肿胀的原因。但是在太空中没有这种引力–人工或其他方式–血液反而被推到胸部和头部。液体转移实际上导致心脏和血管的血流量低于正常水平，这反过来又导致宇航员的浮肿和静脉隆起。 这种整体缺乏重力的情况极大地影响了身体和循环系统。美国宇航局和世界各地的其他航天机构已经花费了大量的时间和精力研究零重力的影响，以帮助应对生活在太空中对身体的影响。 根据美国宇航局的说法，胸部和头部的血液会对健康产生不利影响，如听力损失，脑压增加导致脑部肿胀，以及被称为航天相关神经眼综合征（SANS）的眼睛变形。缺乏重力导致肌肉因萎缩而退化，心脏的形状从地球上看到的典型的椭圆形变成更像一个圆球。 当宇航员返回充满重力的地球时，血液和液体被拉回到腹部和腿部。这种液体转移和身体的其他变化使它更难控制血压的下降。这可能会导致一些宇航员变得头晕，有时还会晕倒，这种情况被称为立位耐力不良。身体适应他们所处的任何环境，而不幸的是，太空不是一个非常友好的环境。
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