天气预报15天查询> 其他> 人是怎么呼吸的

人是怎么呼吸的

更新时间: 2020-09-15 00:00:00     

人的胸腹部有肋间肌和膈肌,当它们扩张的时候,肺的体积膨胀,造成肺内空气压强小于外部大气压,外部气压把空气压入肺部,空气在肺部与血液内的气体进行扩散交换,使人体吸入氧气,排出二氧化碳。然后肋间肌和膈肌收缩,肺体积缩小。肺内部气体压强增大,大于外部大气压,把气体排出。如此循环,完成呼吸的过程。

关键词: 怎么 呼吸

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-122582/ | 耗时:0.9591 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=122582 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=122582 LIMIT 0,1
select * from tbl_Articles_sphinx where id=122582 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1124041,1074824,1373022,1050439,1060721,1058843,1004983,1124241,1113037,1076764,1114836,1097723,1090232,1077667,1055235,1080086,1065749,1493313,995175,1125329,1050037,1056538,1056274,1051425,3267405,1124400,2480522,1125478,1058865,1131551) ORDER BY field (ArticleID,1124041,1074824,1373022,1050439,1060721,1058843,1004983,1124241,1113037,1076764,1114836,1097723,1090232,1077667,1055235,1080086,1065749,1493313,995175,1125329,1050037,1056538,1056274,1051425,3267405,1124400,2480522,1125478,1058865,1131551)