Chapter V

Of the Motion, Action and Office of the Heart

From these and other observations of a similar nature, I am persuaded it will be found that the motion of the heart is as follows:

First of all, the auricle contracts, and in the course of its contraction¹ forces the blood (which it contains in ample quantity as the head of the veins², the store — house and cistern³ of the blood) into the ventricle, which, being filled, the heart raises itself straightway, makes all its fibres tense, contracts the ventricles, and performs a beat, by which beat it immediately sends the blood supplied to it by the auricle into the arteries⁴. The right ventricle sends its charge into the lungs by the vessel⁵ which is called vena arteriosa, but which in structure and function, and all other respects, is an artery⁶. The left ventricle sends its charge into the aorta⁷, and through this by the arteries to the body at large.

These two motions, one of the ventricles, the other of the auricles, take place consecutively⁸, but in such a manner that there is a kind of harmony or rhythm preserved between them, the two concurring⁹ in such wise that but one motion is apparent, especially in the warmer blooded animals, in which the movements in question are rapid. Nor is this for any other reason than it is in a piece of machinery¹⁰, in which, though one wheel gives motion to another, yet all the wheels seem to move simultaneously¹¹; or in that mechanical contrivance which is adapted to firearms, where, the trigger being touched, down comes the flint, strikes against the steel, elicits¹² a spark, which falling among the powder, ignites it, when the flame extends, enters the barrel, causes the explosion, propels the ball, and the mark is attained¹³ — all of which incidents, by reason of the celerity with which they happen, seem to take place in the twinkling of an eye. So also in deglutition: by the elevation¹⁴ of the root of the tongue, and the compression of the mouth, the food or drink is pushed into the fauces, when the larynx is closed by its muscles and by the epiglottis. The pharynx is then raised and opened by its muscles in the same way as a sac that is to be filled is lifted up and its mouth dilated¹⁵. Upon the mouthful being received, it is forced downwards¹⁶ by the transverse muscles, and then carried farther by the longitudinal ones. Yet all these motions, though executed by different and distinct organs, are performed harmoniously¹⁷, and in such order that they seem to constitute but a single motion and act, which we call deglutition.

Even so does it come to pass with the motions and action of the heart, which constitute a kind of deglutition, a transfusion¹⁸ of the blood from the veins to the arteries. And if anyone, bearing these things in mind, will carefully watch the motions of the heart in the body of a living animal, he will perceive not only all the particulars I have mentioned, viz., the heart becoming erect¹⁹, and making one continuous motion with its auricles; but farther, a certain obscure undulation and lateral²⁰ inclination²¹ in the direction of the axis²² of the right ventricle, as if twisting itself slightly in performing its work. And indeed everyone may see, when a horse drinks, that the water is drawn²³ in and transmitted to the stomach at each movement of the throat, which movement produces a sound and yields a pulse both to the ear and the touch; in the same way it is with each motion of the heart, when there is the delivery of a quantity of blood from the veins to the arteries a pulse takes place, and can be heard within the chest.

The motion of the heart, then, is entirely²⁴ of this description, and the one action of the heart is the transmission of the blood and its distribution, by means of the arteries, to the very extremities²⁵ of the body; so that the pulse which we feel in the arteries is nothing more than the impulse of the blood derived²⁶ from the heart.

Whether or not the heart, besides propelling the blood, giving it motion locally, and distributing it to the body, adds anything else to it — heat, spirit, perfection — must be inquired into by — and — by, and decided²⁷ upon other grounds. So much may suffice at this time, when it is shown that by the action of the heart the blood is transfused²⁸ through the ventricles from the veins to the arteries, and distributed by them to all parts of the body.

The above, indeed, is admitted by all, both from the structure of the heart and the arrangement and action of its valves. But still they are like persons purblind²⁹ or groping about in the dark, for they give utterance³⁰ to various, contradictory³¹, and incoherent sentiments, delivering many things upon conjecture³², as we have already shown.

The grand cause of doubt and error in this subject appears to me to have been the intimate connexion between the heart and the lungs. When men saw both the pulmonary artery and the pulmonary veins losing themselves in the lungs, of course it became a puzzle to them to know how or by what means the right ventricle should distribute the blood to the body, or the left draw it from the venae cavae. This fact is borne witness to by Galen, whose words, when writing against Erasistratus in regard to the origin and use of the veins and the coction of the blood, are the following 7: “You will reply,” he says, “that the effect is so; that the blood is prepared in the liver, and is thence transferred to the heart to receive its proper form and last perfection; a statement which does not appear devoid³³ of reason; for no great and perfect work is ever accomplished³⁴ at a single effort, or receives its final polish from one instrument. But if this be actually so, then show us another vessel which draws the absolutely perfect blood from the heart, and distributes it as the arteries do the spirits over the whole body.” Here then is a reasonable opinion not allowed, because, forsooth, besides not seeing the true means of transit³⁵, he could not discover the vessel which should transmit the blood from the heart to the body at large!

But had anyone been there in behalf of Erasistratus, and of that opinion which we now espouse³⁶, and which Galen himself acknowledges in other respects consonant³⁷ with reason, to have pointed³⁸ to the aorta as the vessel which distributes the blood from the heart to the rest of the body, I wonder what would have been the answer of that most ingenious and learned man? Had he said that the artery transmits spirits and not blood, he would indeed sufficiently³⁹ have answered Erasistratus, who imagined that the arteries contained nothing but spirits; but then he would have contradicted himself, and given a foul⁴⁰ denial to that for which he had keenly contended in his writings against this very Erasistratus, to wit, that blood in substance is contained in the arteries, and not spirits; a fact which he demonstrated not only by many powerful arguments, but by experiments.

But if the divine Galen will here allow, as in other places he does, “that all the arteries of the body arise from the great artery, and that this takes its origin from the heart; that all these vessels⁴¹ naturally contain and carry blood; that the three semilunar valves situated⁴² at the orifice of the aorta prevent the return of the blood into the heart, and that nature never connected them with this, the most noble viscus of the body, unless for some important end”; if, I say, this father of physicians concedes all these things — and I quote his own words — I do not see how he can deny that the great artery is the very vessel to carry the blood, when it has attained its highest term for term of perfection, from the heart for distribution to all parts of the body. Or would he perchance still hesitate, like all who have come after him, even to the present hour, because he did not perceive the route by which the blood was transferred from the veins to the arteries, in consequence, as I have already said, of the intimate connexion between the heart and the lungs? And that this difficulty puzzled anatomists not a little, when in their dissections they found the pulmonary artery and left ventricle full of thick, black, and clotted⁴³ blood, plainly appears, when they felt themselves compelled to affirm that the blood made its way from the right to the left ventricle by transuding through the septum of the heart. But this fancy I have already refuted. A new pathway for the blood must therefore be prepared and thrown open, and being once exposed, no further difficulty will, I believe, be experienced by anyone in admitting what I have already proposed in regard to the pulse of the heart and arteries, viz., the passage of the blood from the veins to the arteries, and its distribution to the whole of the body by means of these vessels.

1 contraction   

n.缩略词，缩写式，害病

参考例句：

• The contraction of this muscle raises the lower arm.肌肉的收缩使前臂抬起。
• The forces of expansion are balanced by forces of contraction.扩张力和收缩力相互平衡。

2 veins   

n.纹理；矿脉( vein的名词复数 )；静脉；叶脉；纹理

参考例句：

• The blood flows from the capillaries back into the veins. 血从毛细血管流回静脉。 来自《简明英汉词典》
• I felt a pleasant glow in all my veins from the wine. 喝过酒后我浑身的血都热烘烘的，感到很舒服。 来自《简明英汉词典》

3 cistern   

n.贮水池

参考例句：

• The cistern is empty but soon fills again.蓄水池里现在没水，但不久就会储满水的。
• The lavatory cistern overflowed.厕所水箱的水溢出来了

4 arteries   

n.动脉( artery的名词复数 )；干线，要道

参考例句：

• Even grafting new blood vessels in place of the diseased coronary arteries has been tried. 甚至移植新血管代替不健康的冠状动脉的方法都已经试过。 来自《简明英汉词典》
• This is the place where the three main arteries of West London traffic met. 这就是伦敦西部三条主要交通干线的交汇处。 来自《简明英汉词典》

5 vessel   

n.船舶；容器，器皿；管，导管，血管

参考例句：

• The vessel is fully loaded with cargo for Shanghai.这艘船满载货物驶往上海。
• You should put the water into a vessel.你应该把水装入容器中。

6 artery   

n.干线，要道；动脉

参考例句：

• We couldn't feel the changes in the blood pressure within the artery.我们无法感觉到动脉血管内血压的变化。
• The aorta is the largest artery in the body.主动脉是人体中的最大动脉。

7 aorta   

n.主动脉

参考例句：

• The abdominal aorta is normally smaller than the thoracic aorta.腹主动脉一般比胸主动脉小。
• Put down that jelly doughnut and look carefully at this aorta.放下手头上的东西，认真观察这张大动脉图片。

8 consecutively   

adv.连续地

参考例句：

• He was actually too depleted to think consecutively about anything. 他已经打不起一点精神，根本谈不上好好思考一下。 来自辞典例句
• In any game, the right to serve shall pass consecutively. 在一局中，不错的发球挨次应该是。 来自互联网

9 concurring   

同时发生的，并发的

参考例句：

• Concurring with expectations, the degree of polymorphism was highest in the central. 正如所料，多型性程度在中部种群中最高。
• The more an affect arises from a number of causes concurring together, the greater it is. 同时凑合起来以激起一个情感的原因愈多，则这个情感将必愈大。

10 machinery   

n.(总称)机械，机器；机构

参考例句：

• Has the machinery been put up ready for the broadcast?广播器材安装完毕了吗？
• Machinery ought to be well maintained all the time.机器应该随时注意维护。

11 simultaneously   

adv.同时发生地，同时进行地

参考例句：

• The radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标。
• The Windows allow a computer user to execute multiple programs simultaneously.Windows允许计算机用户同时运行多个程序。

12 elicits   

引出，探出( elicit的第三人称单数 )

参考例句：

• You might find that a sympathetic approach elicits kinder and gentler behavior. 你或许会发现用同情的方法，可引出更友善及更温和的行为。
• It presents information, shares ideas and elicits emotions. 它展示信息、流思想和抒发情感。

13 attained   

（通常经过努力）实现( attain的过去式和过去分词 )； 达到； 获得； 达到（某年龄、水平、状况）

参考例句：

• She has attained the degree of Master of Arts. 她已获得文学硕士学位。
• Lu Hsun attained a high position in the republic of letters. 鲁迅在文坛上获得崇高的地位。

14 elevation   

n.高度；海拔；高地；上升；提高

参考例句：

• The house is at an elevation of 2,000 metres.那幢房子位于海拔两千米的高处。
• His elevation to the position of General Manager was announced yesterday.昨天宣布他晋升总经理职位。

15 dilated   

adj.加宽的，扩大的v.（使某物）扩大，膨胀，张大( dilate的过去式和过去分词 )

参考例句：

• Her eyes dilated with fear. 她吓得瞪大了眼睛。
• The cat dilated its eyes. 猫瞪大了双眼。 来自《简明英汉词典》

16 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。

17 harmoniously   

和谐地，调和地

参考例句：

• The president and Stevenson had worked harmoniously over the last eighteen months. 在过去一年半里，总统和史蒂文森一起工作是融洽的。
• China and India cannot really deal with each other harmoniously. 中国和印度这两只猛兽不可能真心实意地和谐相处。

18 transfusion   

n.输血，输液

参考例句：

• She soon came to her senses after a blood transfusion.输血后不久她就苏醒了。
• The doctor kept him alive by a blood transfusion.医生靠输血使他仍然活着。

19 erect   

n./v.树立，建立，使竖立；adj.直立的，垂直的

参考例句：

• She held her head erect and her back straight.她昂着头，把背挺得笔直。
• Soldiers are trained to stand erect.士兵们训练站得笔直。

20 lateral   

adj.侧面的，旁边的

参考例句：

• An airfoil that controls lateral motion.能够控制横向飞行的机翼。
• Mr.Dawson walked into the court from a lateral door.道森先生从一个侧面的门走进法庭。

21 inclination   

n.倾斜；点头；弯腰；斜坡；倾度；倾向；爱好

参考例句：

• She greeted us with a slight inclination of the head.她微微点头向我们致意。
• I did not feel the slightest inclination to hurry.我没有丝毫着急的意思。

22 axis   

n.轴，轴线，中心线；坐标轴，基准线

参考例句：

• The earth's axis is the line between the North and South Poles.地轴是南北极之间的线。
• The axis of a circle is its diameter.圆的轴线是其直径。

23 drawn   

v.拖，拉，拔出；adj.憔悴的，紧张的

参考例句：

• All the characters in the story are drawn from life.故事中的所有人物都取材于生活。
• Her gaze was drawn irresistibly to the scene outside.她的目光禁不住被外面的风景所吸引。

24 entirely   

ad.全部地，完整地；完全地，彻底地

参考例句：

• The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
• His life was entirely given up to the educational work. 他的一生统统献给了教育工作。

25 extremities   

n.端点( extremity的名词复数 )；尽头；手和足；极窘迫的境地

参考例句：

• She was most noticeable, I thought, in respect of her extremities. 我觉得她那副穷极可怜的样子实在太惹人注目。 来自辞典例句
• Winters may be quite cool at the northwestern extremities. 西北边区的冬天也可能会相当凉。 来自辞典例句

26 derived   

vi.起源；由来；衍生；导出v.得到( derive的过去式和过去分词 )；（从…中）得到获得；源于；（从…中）提取

参考例句：

• Many English words are derived from Latin and Greek. 英语很多词源出于拉丁文和希腊文。 来自《简明英汉词典》
• He derived his enthusiasm for literature from his father. 他对文学的爱好是受他父亲的影响。 来自《简明英汉词典》

27 decided   

adj.决定了的，坚决的；明显的，明确的

参考例句：

• This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
• There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。

28 transfused   

v.输（血或别的液体）( transfuse的过去式和过去分词 )；渗透；使…被灌输或传达

参考例句：

• He transfused his own courage into his men. 他用自己的勇气鼓舞了士兵。 来自《现代英汉综合大词典》
• The professor transfused his enthusiasm for research into his students. 教授把自己的研究热忱移注给学生。 来自辞典例句

29 purblind   

adj.半盲的；愚笨的

参考例句：

• If an administrator has no access to information,it's as if he was purblind and hard of hearing and had a stuffed nose.做管理工作的人没有信息，就是耳目不灵，鼻子不通。
• Even his most purblind supporters knows this is nonsense.即使他最愚蠢的支持者也知道这是无稽之谈。

30 utterance   

n.用言语表达，话语，言语

参考例句：

• This utterance of his was greeted with bursts of uproarious laughter.他的讲话引起阵阵哄然大笑。
• My voice cleaves to my throat,and sob chokes my utterance.我的噪子哽咽，泣不成声。

31 contradictory   

adj.反驳的，反对的，抗辩的；n.正反对，矛盾对立

参考例句：

• The argument is internally contradictory.论据本身自相矛盾。
• What he said was self-contradictory.他讲话前后不符。

32 conjecture   

n./v.推测，猜测

参考例句：

• She felt it no use to conjecture his motives.她觉得猜想他的动机是没有用的。
• This conjecture is not supported by any real evidence.这种推测未被任何确切的证据所证实。

33 devoid   

adj.全无的，缺乏的

参考例句：

• He is completely devoid of humour.他十分缺乏幽默。
• The house is totally devoid of furniture.这所房子里什么家具都没有。

34 accomplished   

adj.有才艺的；有造诣的；达到了的

参考例句：

• Thanks to your help,we accomplished the task ahead of schedule.亏得你们帮忙,我们才提前完成了任务。
• Removal of excess heat is accomplished by means of a radiator.通过散热器完成多余热量的排出。

35 transit   

n.经过，运输；vt.穿越，旋转；vi.越过

参考例句：

• His luggage was lost in transit.他的行李在运送中丢失。
• The canal can transit a total of 50 ships daily.这条运河每天能通过50条船。

36 espouse   

v.支持，赞成，嫁娶

参考例句：

• Today,astronomers espouse the theory that comets spawn the swarms.如今，天文学家们支持彗星产生了流星团的说法。
• Some teachers enthusiastically espouse the benefits to be gained from educational software.有些教师热烈赞同可以从教学软件中得到好处的观点。

37 consonant   

n.辅音；adj.[音]符合的

参考例句：

• The quality of this suit isn't quite consonant with its price.这套衣服的质量和价钱不相称。
• These are common consonant clusters at the beginning of words.这些单词的开头有相同辅音组合。

38 pointed   

adj.尖的，直截了当的

参考例句：

• He gave me a very sharp pointed pencil.他给我一支削得非常尖的铅笔。
• She wished to show Mrs.John Dashwood by this pointed invitation to her brother.她想通过对达茨伍德夫人提出直截了当的邀请向她的哥哥表示出来。

39 sufficiently   

adv.足够地，充分地

参考例句：

• It turned out he had not insured the house sufficiently.原来他没有给房屋投足保险。
• The new policy was sufficiently elastic to accommodate both views.新政策充分灵活地适用两种观点。

40 foul   

adj.污秽的；邪恶的；v.弄脏；妨害；犯规；n.犯规

参考例句：

• Take off those foul clothes and let me wash them.脱下那些脏衣服让我洗一洗。
• What a foul day it is!多么恶劣的天气！

41 vessels   

n.血管( vessel的名词复数 )；船；容器；（具有特殊品质或接受特殊品质的）人

参考例句：

• The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
• All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》

42 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。

43 clotted   

adj.凝结的v.凝固( clot的过去式和过去分词 )

参考例句：

• scones and jam with clotted cream 夹有凝脂奶油和果酱的烤饼
• Perspiration clotted his hair. 汗水使他的头发粘在一起。 来自《现代英汉综合大词典》