来自《耶鲁大学开放课程：生物医学工程探索第16集第16集》

labeled number 6 here.

用数字"6"标注
This the vessel through which urine flows.

尿液在这根导管中流动
That urine flows out of the kidney and then down,

尿液从肾脏流出并向下
down--you can see this ureter,

向下你可以见到这根输尿管
one from each kidney,

每个肾脏各有一根
flowing down into this sac called the bladder.

向下流至叫做膀胱的液囊中
Then,the bladder has another vessel

接下来膀胱还有一根导管
which connects to the outside world called the urethra.

与外部世界相连它叫做尿道
Urine is produced continuously by the kidneys,

尿液持续地从肾脏中产生
urine is continuously flowing,

尿液持续地流出
although the rate might change with time.

尽管速度随着时间而变化
It's continually flowing into the bladder,

它持续地流进膀胱