Book III chapter 3

Below the head lies the neck, in such animals as have one. This is the case with those only that have the parts to which a neck is subservient¹. These parts are the larynx and what is called the oesophagus. Of these the former, or larynx, exists for the sake of respiration², being the instrument by which such animals as breathe inhale³ and discharge the air. Therefore it is that, when there is no lung, there is also no neck. Of this condition the Fishes are an example. The other part, or oesophagus, is the channel through which food is conveyed to the stomach; so that all animals that are without a neck are also without a distinct oesophagus; Such a part is in fact not required of necessity for nutritive purposes; for it has no action whatsoever⁴ on the food. Indeed there is nothing to prevent the stomach from being placed directly after the mouth. This, however, is quite impossible in the case of the lung. For there must be some sort of tube common to the two divisions of the lung, by which — it being bipartite — the breath may be apportioned⁵ to their respective bronchi, and thence pass into the air-pipes; and such an arrangement will be the best for giving perfection to inspiration and expiration⁶. The organ then concerned in respiration must of necessity be of some length; and this, again, necessitates⁷ there being an oesophagus to unite mouth and stomach. This oesophagus is of a flesh-like character, and yet admits of extension like a sinew. This latter property is given to it, that it may stretch when food is introduced; while the flesh-like character is intended to make it soft and yielding, and to prevent it from being rasped by particles as they pass downwards⁸, and so suffering damage. On the other hand, the windpipe and the so-called larynx are constructed out of a cartilaginous substance. For they have to serve not only for respiration, but also for vocal⁹ purposes; and an instrument that is to produce sounds must necessarily be not only smooth but firm. The windpipe lies in front of the oesophagus, although this position causes it to be some hindrance¹⁰ to the latter in the act of deglutition. For if a morsel¹¹ of food, fluid or solid, slips into it by accident, choking and much distress¹² and violent fits of coughing ensue. This must be a matter of astonishment¹³ to any of those who assert that it is by the windpipe that an animal imbibes¹⁴ fluid. For the consequences just mentioned occur invariably, whenever a particle of food slips in, and are quite obvious. Indeed on many grounds it is ridiculous to say that this is the channel through which animals imbibe¹⁵ fluid. For there is no passage leading from the lung to the stomach, such as the oesophagus which we see leading thither¹⁶ from the mouth. Moreover, when any cause produces sickness and vomiting¹⁷, it is plain enough when the fluid is discharged. It is manifest also that fluid, when swallowed, does not pass directly into the bladder and collect there, but goes first into the stomach. For, when red wine is taken, the dejections of the stomach are seen to be coloured by its dregs; and such discoloration has been even seen on many occasions inside the stomach itself, in cases where there have been wounds opening into that organ. However, it is perhaps silly to be minutely particular in dealing¹⁸ with silly statements such as this.

The windpipe then, owing to its position in front of the oesophagus, is exposed, as we have said, to annoyance¹⁹ from the food. To obviate²⁰ this, however, nature has contrived²¹ the epiglottis. This part is not found in all sanguineous animals, but only in such of them as have a lung; nor in all of these, but only in such as at the same time have their skin covered with hairs, and not either with scaly²² plates or with feathers. In such scaly and feathered animals there is no epiglottis, but its office is supplied by the larynx, which closes and opens, just as in the other case the epiglottis falls down and rises up; rising up during the ingress or egress²³ of breath, and falling down during the ingestion of food, so as to prevent any particle from slipping into the windpipe. Should there be the slightest want of accuracy in this movement, or should an inspiration be made during the ingestion of food, choking and coughing ensue, as already has been noticed. So admirably contrived, however, is the movement both of the epiglottis and of the tongue, that, while the food is being ground to a pulp²⁴ in the mouth, the tongue very rarely gets caught between the teeth; and, while the food is passing over the epiglottis seldom does a particle of it slip into the windpipe.

The animals which have been mentioned as having no epiglottis owe this deficiency to the dryness of their flesh and to the hardness of their skin. For an epiglottis made of such materials would not admit of easy motion. It would, indeed, take a longer time to shut down an epiglottis made of the peculiar²⁵ flesh of these animals, and shaped like that of those with hairy skins, than to bring the edges of the windpipe itself into contact with each other.

Thus much then as to the reason why some animals have an epiglottis while others have none, and thus much also as to its use. It is a contrivance of nature to remedy the vicious position of the windpipe in front of the oesophagus. That position is the result of necessity. For it is in the front and centre of the body that the heart is situated²⁶, in which we say is the principle of life and the source of all motion and sensation. (For sensation and motion are exercised in the direction which we term forwards, and it is on this very relation that the distinction of before and behind is founded.) But where the heart is, there and surrounding it is the lung. Now inspiration, which occurs for the sake of the lung and for the sake of the principle which has its seat in the heart, is effected through the windpipe. Since then the heart must of necessity lie in the very front place of all, it follows that the larynx also and the windpipe must of necessity lie in front of the oesophagus. For they lead to the lung and heart, whereas the oesophagus leads to the stomach. And it is a universal law that, as regards above and below, front and back, right and left, the nobler and more honourable²⁷ part invariably is placed uppermost, in front, and on the right, rather than in the opposite positions, unless some more important object stands in the way.

1 subservient   

adj.卑屈的，阿谀的

参考例句：

• He was subservient and servile.他低声下气、卑躬屈膝。
• It was horrible to have to be affable and subservient.不得不强作欢颜卖弄风骚，真是太可怕了。

2 respiration   

n.呼吸作用；一次呼吸；植物光合作用

参考例句：

• They tried artificial respiration but it was of no avail.他们试做人工呼吸，可是无效。
• They made frequent checks on his respiration,pulse and blood.他们经常检查他的呼吸、脉搏和血液。

3 inhale   

v.吸入(气体等)，吸(烟)

参考例句：

• Don't inhale dust into your lung.别把灰尘吸进肺里。
• They are pleased to not inhale second hand smoke.他们很高兴他们再也不会吸到二手烟了。

4 whatsoever   

adv.（用于否定句中以加强语气）任何；pron.无论什么

参考例句：

• There's no reason whatsoever to turn down this suggestion.没有任何理由拒绝这个建议。
• All things whatsoever ye would that men should do to you,do ye even so to them.你想别人对你怎样，你就怎样对人。

5 apportioned   

vt.分摊，分配（apportion的过去式与过去分词形式）

参考例句：

• They apportioned the land among members of the family. 他们把土地分给了家中各人。
• The group leader apportioned them the duties for the week. 组长给他们分派了这星期的任务。 来自《现代汉英综合大词典》

6 expiration   

n.终结，期满，呼气，呼出物

参考例句：

• Can I have your credit card number followed by the expiration date?能告诉我你的信用卡号码和它的到期日吗?
• This contract shall be terminated on the expiration date.劳动合同期满，即行终止。

7 necessitates   

使…成为必要，需要( necessitate的第三人称单数 )

参考例句：

• The increase in population necessitates a greater food supply. 人口的增加需要更多食物供应。
• Your proposal necessitates borrowing money. 你的提议使借款成为必要。

8 downwards   

adj./adv.向下的（地），下行的（地）

参考例句：

• He lay face downwards on his bed.他脸向下伏在床上。
• As the river flows downwards,it widens.这条河愈到下游愈宽。

9 vocal   

adj.直言不讳的；嗓音的；n.[pl.]声乐节目

参考例句：

• The tongue is a vocal organ.舌头是一个发音器官。
• Public opinion at last became vocal.终于舆论哗然。

10 hindrance   

n.妨碍，障碍

参考例句：

• Now they can construct tunnel systems without hindrance.现在他们可以顺利地建造隧道系统了。
• The heavy baggage was a great hindrance to me.那件行李成了我的大累赘。

11 morsel   

n.一口，一点点

参考例句：

• He refused to touch a morsel of the food they had brought.他们拿来的东西他一口也不吃。
• The patient has not had a morsel of food since the morning.从早上起病人一直没有进食。

12 distress   

n.苦恼，痛苦，不舒适；不幸；vt.使悲痛

参考例句：

• Nothing could alleviate his distress.什么都不能减轻他的痛苦。
• Please don't distress yourself.请你不要忧愁了。

13 astonishment   

n.惊奇，惊异

参考例句：

• They heard him give a loud shout of astonishment.他们听见他惊奇地大叫一声。
• I was filled with astonishment at her strange action.我对她的奇怪举动不胜惊异。

14 imbibes   

v.吸收( imbibe的第三人称单数 )；喝；吸取；吸气

参考例句：

• He imbibes vast quantities of strong coffee. 他喝大量的浓咖啡。 来自辞典例句

15 imbibe   

v.喝，饮；吸入，吸收

参考例句：

• Plants imbibe nourishment usually through their leaves and roots.植物通常经过叶和根吸收养分。
• I always imbibe fresh air in the woods.我经常在树林里呼吸新鲜空气。

16 thither   

adv.向那里；adj.在那边的，对岸的

参考例句：

• He wandered hither and thither looking for a playmate.他逛来逛去找玩伴。
• He tramped hither and thither.他到处流浪。

17 vomiting   

吐

参考例句：

• Symptoms include diarrhoea and vomiting. 症状有腹泻和呕吐。
• Especially when I feel seasick, I can't stand watching someone else vomiting." 尤其晕船的时候，看不得人家呕。”

18 dealing   

n.经商方法，待人态度

参考例句：

• This store has an excellent reputation for fair dealing.该商店因买卖公道而享有极高的声誉。
• His fair dealing earned our confidence.他的诚实的行为获得我们的信任。

19 annoyance   

n.恼怒，生气，烦恼

参考例句：

• Why do you always take your annoyance out on me?为什么你不高兴时总是对我出气？
• I felt annoyance at being teased.我恼恨别人取笑我。

20 obviate   

v.除去，排除，避免，预防

参考例句：

• Improved public transportation would obviate the need tor everyone to have their own car.公共交通的改善消除了每人都要有车的必要性。
• This deferral would obviate pressure on the rouble exchange rate.这一延期将消除卢布汇率面临的压力。

21 contrived   

adj.不自然的，做作的；虚构的

参考例句：

• There was nothing contrived or calculated about what he said.他说的话里没有任何蓄意捏造的成分。
• The plot seems contrived.情节看起来不真实。

22 scaly   

adj.鱼鳞状的；干燥粗糙的

参考例句：

• Reptiles possess a scaly,dry skin.爬行类具有覆盖着鳞片的干燥皮肤。
• The iron pipe is scaly with rust.铁管子因为生锈一片片剥落了。

23 egress   

n.出去；出口

参考例句：

• Safe access and egress can be achieved by various methods.可以采用各种方法安全的进入或离开。
• Drains achieve a ready egress of the liquid blood.引流能为血液提供一个容易的出口。

24 pulp   

n.果肉，纸浆；v.化成纸浆，除去...果肉，制成纸浆

参考例句：

• The pulp of this watermelon is too spongy.这西瓜瓤儿太肉了。
• The company manufactures pulp and paper products.这个公司制造纸浆和纸产品。

25 peculiar   

adj.古怪的，异常的；特殊的，特有的

参考例句：

• He walks in a peculiar fashion.他走路的样子很奇特。
• He looked at me with a very peculiar expression.他用一种很奇怪的表情看着我。

26 situated   

adj.坐落在...的，处于某种境地的

参考例句：

• The village is situated at the margin of a forest.村子位于森林的边缘。
• She is awkwardly situated.她的处境困难。

27 honourable   

adj.可敬的；荣誉的，光荣的

参考例句：

• I don't think I am worthy of such an honourable title.这样的光荣称号，我可担当不起。
• I hope to find an honourable way of settling difficulties.我希望设法找到一个体面的办法以摆脱困境。