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.

直肠发出信号同也发送到了脑干和丘脑；当它们认定“机”，会下达指令使肛外括约肌松弛；粪就能——不出意外话——顺利排入马桶。

The large intestine — consisting of the colon, rectum, and anus — is relatively short, at about one and half meters, and it provides a nice little frame for the small intestine, here at the end of the alimentary canal.

大肠——由结肠、直肠和肛——相对较短，大约 1.5 米，它为小肠提供了一个漂亮小框架，在消化道末端。

Instead, from the gut, bacteria get to the rectum, anus and eventually colonizes the perineum, becoming part of the normal flora.

相反，细菌由肠道到达直肠、肛，最终定居于会阴，为正常菌群一部分。

The rectum serves as a reservoir for feces. It terminates in the lower opening of the gastrointestinal tract, the anus, which is the external opening through which feces are released from the body.

直肠作为粪容器，终止于胃肠道下部开口，即肛，肛是粪从身体排出外部开口。