Meanwhile, signals are sent to the brainstem and thalamus, and when these decide the right moment has come, they allow the external anal sphincter to relax - and feces goes, hopefully, into the toilet bowl.

直肠发出的信号同时也发送到了脑干和丘脑；当它们认定“时机成熟”时，便会下达指令使肛门外括约肌松弛；粪便就能——不出意外的话——顺利排入马桶。