As varied as the animal kingdom's anuses are, none of them have bones.

尽管动物王国肛门种类繁多，但没有一个肛门是有骨头。

Specialized tube feet can be used for feeding and respiration, though many sea cucumbers actually breathe through their anuses.

专门管脚可用于进食和呼吸，尽管许多海参实际上是通过肛门呼吸。

During life's three billion-plus year journey on Earth, anal evolution happened independently many times in different branches of life.

在生命在地球上 30 亿多年旅程中，肛门进化在不同生命分支中独立发生了许多次。

Hemorrhoids are swollen veins near the anus and rectum, which can be painful and lead to itching and bleeding.

痔疮是肛门和直肠附近脉，会引起疼痛并导致瘙痒和出血。

The most widely-used definition of deuterostome has to do with how our mouths and — the SciShow comments’ favorite term — anuses develop.

最广泛使用后口动物定义与我们嘴巴和——SciShow 评论最喜术语——肛门发育方式有关。

He put one of his feet on the fish and slit him quickly from the vent up to the tip of his lower jaw.

他用一只脚踩在鱼身上，从肛门朝上，倏一刀直剖到它尖端。

We — and all animals from the simplest worms on up the Tree of Life — are really just tubes, corridors of tissue running from a mouth to an anus.

我们——以及生命之树上最简单蠕虫——实际上只是管子，从嘴到肛门组织走廊。

Certain species of crabs and pearlfish take advantage of this rhythmic action and, once the sea cucumber's anus is dilated, they shimmy in and take shelter.

某些种类螃蟹和珍珠鱼利用这种有节奏动作，一旦海参肛门扩张， 它们就会潜入并躲避。

Oxygen from the air enters the blood through capillaries in the walls of these air spaces, and the blood release carbon dioxide into the air spaces to be exhaled.

消化系统由从口腔延伸到肛门管道组成。

In fact, the enteric nervous system, which is an extensive mesh-like network of neurons that controls your entire digestive tract from the esophagus to the anus, doesn't even require the brain at all.

事实上，肠道神经系统是一个由神经元组成网状网络，控制着从食道到肛门整个消化道，它甚至不需要大脑控制。

By loosening the attachments of internal tissues then quickly softening and contracting their muscles, many species are capable of shooting a wide range of organs out of their anuses.

通过松开内部组织附着物，然后迅速软化和收缩它们肌肉，许多物种都能够从它们肛门中射出范围广泛器官。

In fact, the enteric nervous system, which is an extensive mesh-like network of neurons that controls your entire digestive tract from the esophagus to the anus, doesn’t even require the brain at all.

事实上，肠神经系统是一个广泛网状神经元网络，控制着从食道到肛门整个消化道，它甚至根本不需要大脑。

So, for instance, there's no evidence that oral and anal characteristics, the personality characteristics I talked about – about being needy versus being stingy – relate in any interesting way to weaning or toilet training.

因此，例如，没有证据表明口腔和肛门特征，我谈到性格特征——关于需要和吝啬——以任何有趣方式与断奶或如厕训练相关。

Now, I'm quite sure that you're familiar with the key players here — they're the hollow organs that form the continuous tube that is your alimentary canal, aka the gastrointestinal tract, which runs from your mouth to your anus.

现在，我很确定你对这里关键选手很熟悉——它们是形成连续管子中空器官，也就是你消化道，也就是胃肠道，从你嘴延伸到你肛门。

In your mouth, in your esophagus, and at the other end of things, at your anus, you have stratified squamous epithelial tissue, just like your epidermis, to help resist the abrasive action of like, chewing, like corn chips, maybe.

在你嘴里，在你食道里，在东西另一端，在你肛门里，你有分层鳞状上皮组织，就像你表皮一样，帮助抵抗研磨作用，比如咀嚼，比如玉米片，也许。

If it starts to rot, or you start to snack on this body, you'll have to cover the stench of decomposition with your own anal secretions so that other hungry, desperate, overworked parents don't come looking for your lunch.

如果它开始腐烂， 或者你开始在这个身体上吃零食，你就必须用你自己肛门分泌物来掩盖腐烂恶臭， 这样其他饥饿、绝望、过度劳累父母就不会来找你午餐了。