You may also stretch your external sphincter muscles.

你也有可能会撑大你的外括约肌。

Typically, that internal sphincter muscle opens up when the bladder is about half full.

一般当膀胱充盈量达到一半时，内括约肌会开放。

Stress incontinence treatments typically focus on strengthening the external sphincter muscle by doing things like Kegel exercises.

压力性尿失禁的治疗侧重增强外括约肌的收缩力，例如通过做Kegel运动。

Alright, as a quick recap, urinary incontinence occurs when urine involuntarily leaves the bladder —through the internal and external sphincter muscles.

得！快速回顾一下：尿失禁是指尿液不自主地通过内外括约肌离开膀胱。

This system also controls the iris sphincter muscle.

该系统还控制虹膜括约肌。

Next there's stress incontinence which is usually due to increased abdominal pressure that overwhelms the sphincter muscles and allows urine to leak out.

第2种被称为压力性尿失禁，通常由于腹内压增高，括约肌无法承受高压，从而造成尿液漏出。

The first door is the internal sphincter muscle, which is made of smooth muscle and is under involuntary control, meaning that it opens and closes automatically.

一个阀门是内括约肌，由平滑肌组成，不受意识支配，意味着它可以自行开合。

Those circular sphincter muscles — yeah, that's right, you've got sphincters everywhere! — contract and expand, changing the size of the dark dot of your pupil.

那些圆形括约肌——是的，没错，你到处都是括约肌！——收缩和扩张，改变瞳孔中黑点的大小。

The second door is the external sphincter muscle, and it's made of skeletal muscle and is under voluntary control, meaning that it opens and closes when a person wants it to.

第2道阀门是外括约肌，由骨骼肌组成，受意识支配，可以按照人们的意愿开合。

Urge incontinence is due to an overactive bladder, stress incontinence is due to too much pressure for the sphincter muscles to resist, and overflow incontinence is due to incomplete emptying of the bladder.

急迫性尿失禁是由于膀胱活动异常活跃；压力性尿失禁是因为括约肌无法抵抗过大的压力；充盈性尿失禁是因为膀胱无法排空。

You increase the pressure in your rectum, the walls squeeze in, the sphincter muscles relax, and… Across the animal kingdom, butts come in many different shapes, sizes, and even numbers.

您增加了直肠的压力，壁被挤压，括约肌放松，并且… … 在整个动物王国中， 屁股有许多不同的形状、大小，甚至数量。