人体左右对称吗?

• 作 者: 杨勇
• 出 处: 科学世界
• 发表日期: 1997年07期
• 关键词: 左右对称 纵轴线 底面积 生物经济学 不对称现象 大脑两半球 最佳工作条件 人体结构 直立行走 轮流使用

随着对人自身了解的深入,我们发现,人体有很多有趣的现象。譬如:从外观看,人体基本上呈左右对称结构。当我们看一个人时,常常不由自主地把他沿纵轴线分为左右两个部分,这条纵轴线就是连接鼻尖与肚脐的直线。于是,我们看到,双耳、双目、双臂、双腿都是那样自然地对称

As we know more about ourselves, we find that the human body has many interesting phenomena. For example: From the exterior view, the human body is basically a symmetrical structure. When we look at a person, we often involuntarily divide him along the longitudinal axis into two parts, the longitudinal axis is the straight line connecting the tip of the nose with the navel. So, we see that the ears, eyes, arms, legs are so naturally symmetrical