The brain can counter it if it's not a good time to urinate by sending another signal to contract the external urethral sphincter.

通过发射另一个信号来控制尿道外括约肌大脑会判断现是不是排尿的合适时机。

The floor of the bladder has a smooth triangular region called the trigone region - with two corners at the ureterovesical junctions and the third corner being the internal urethral orifice, where the bladder meets the urethra.

的底部有一个光滑的三角形区域，称为三角；角顶端为输尿管-连接处，第三角定点为尿道内口；与尿道通过尿道内口相通。

Here the male urethral sphincter contracts to make sure urine doesn't mix with semen.

这里，男性尿道括约肌收缩以确保尿液不会与精液混合。

Whooshing downwards, the fluid enters the urethra and stops short at the external urethral sphincter.

液体飞速的向下流进尿道，经尿道排出体外。

This tells the detrusor to contract while the internal urethral sphincter simultaneously opens, and the external sphincter relaxes so that the pee can flow out.

这告诉逼尿肌收缩，同时尿道内括约肌打开，外括约肌放松，以便尿液流出。

The urethra is a thin muscular tube that drains urine from the bladder, starting from the internal urethral orifice to the external opening.

尿道是细的肌性管道，引流尿液；起于尿道内口，终于尿道外口。

In men and women, around the internal urethral orifice, the detrusor muscle thickens to form the internal sphincter.

无论男性女性，尿道内口的逼尿肌增厚，形成尿道内括约肌。

But let's assume for the sake of polite conversation that you have found an appropriate location to relieve yourself: Your urine enters the thin but muscular urethra by passing through the internal urethral sphincter.

但是为了礼貌的谈话，让我们假设你已经找到了一个合适的位置来缓解自己：你的尿液通过尿道内括约肌进入薄而肌肉发达的尿道。

The external urethral sphincter is one of the muscles of the pelvic floor, and it provides support to the urethra and bladder neck.

尿道外括约肌是一种盆底肌，它向尿道和颈提供支撑。

In an anatomical female, that involves the vulva, which includes the mons pubis over the pubic bone, and labia majora and labia minora — the elongated skin folds that surround the vestibule, which contains both the urethral and vaginal openings.

解剖学女性，这涉及外阴，包括耻骨上的耻骨，大阴唇和小阴唇——前庭周围的细长皮肤褶皱，前庭包括尿道口和阴道口。

The internal urethral sphincter automatically and involuntarily opens, and the urine is released.

尿道内括约肌自然而然的张开，尿就排出来了。

But under normal circumstances, your decision to urinate stops the brain's signal to the external urethral sphincter, causing it to relax and the bladder to empty.

但是正常情况下，你要排尿的决定阻止了大脑向尿道外括约肌发出信号使得它开始放松，排空。

Simultaneously, the internal urethral sphincter opens. This is called the micturition reflex.

同时，括约肌内壁开始打开。这叫做排尿反射。

Two kidneys, two ureters, two urethral sphincters, and a urethra.

个肾脏、条输尿管、道尿道括约肌以及一条尿道。

The original group examined by the researchers was made up entirely of people with prostate or urethral gland cancer, and included only one woman among 100 subjects.

研究人员检查的原始组完全由前列腺癌或尿道腺癌患者组成， 并且 100 名受试者仅包括一名女性。

The urethral sphincter is a collective name for the muscles used to control the flow of urine from the urinary bladder.

尿道括约肌是用来控制尿液流出的肌肉的总称。

Simultaneously, the internal urethral sphincter opens.

同时，内括约肌也打开了。