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(1) When a person is sitting, the average angle between the rectum and anus is about 92 degrees. When he is squatting, the average angle increases to 132 degrees. Thus stools can pass out much more easily. (1) 当一个人坐着时,直肠和肛门之间的平均角度是92度。当他蹲着时,平均角度却增加到132度。因此,粪便更容易排出。 |
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Side view sit |
Side view squat |
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(2) When a person is squatting, the valve between the small and large intestines (ileo-caecal valve), is closed by the pressure of the thigh against the abdomen. This prevents the back flow of stools into the small intestines. The sigmoid colon is also lifted, thus allowing the stools to travel more smoothly to the rectum. (2) 在蹲着的时候,小肠和大肠之间的活阀(回肠-盲肠括约筋),被紧靠在腹部的大腿封闭。这避免粪便倒流到小肠里。同时,乙状结肠也被托高,使到粪便能够顺畅的通行。 |
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Front view sit |
Front view squat |
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