Chapter III

Of the Motions of the Arteries¹, as Seen in the Dissection² of Living Animals

In connexion with the motions of the heart these things are further to be observed having reference to the motions and pulses of the arteries.

1. At the moment the heart contracts, and when the breast is struck, when in short the organ is in its state of systole, the arteries are dilated³, yield a pulse, and are in the state of diastole. In like manner, when the right ventricle contracts and propels its charge of blood, the pulmonary artery⁴ is distended⁵ at the same time with the other arteries of the body.

2. When the left ventricle ceases to act, to contract, to pulsate⁶, the pulse in the arteries also ceases; further, when this ventricle contracts languidly, the pulse in the arteries is scarcely perceptible. In like manner, the pulse in the right ventricle failing, the pulse in the pulmonary artery ceases also.

3. Further, when an artery is divided or punctured⁷, the blood is seen to be forcibly propelled from the wound the moment the left ventricle contracts; and, again, when the pulmonary artery is wounded, the blood will be seen spouting⁸ forth⁹ with violence at the instant when the right ventricle contracts.

So also in fishes, if the vessel¹⁰ which leads from the heart to the gills be divided, at the moment when the heart becomes tense and contracted, at the same moment does the blood flow with force from the divided vessel.

In the same way, when we see the blood in arteriotomy projected now to a greater, now to a less distance, and that the greater jet corresponds to the diastole of the artery and to the time when the heart contracts and strikes the ribs¹¹, and is in its state of systole, we understand that the blood is expelled by the same movement.

From these facts it is manifest, in opposition¹² to commonly received opinions, that the diastole of the arteries corresponds with the time of the heart’s systole; and that the arteries are filled and distended by the blood forced into them by the contraction¹³ of the ventricles; the arteries, therefore, are distended, because they are filled like sacs or bladders, and are not filled because they expand like bellows¹⁴. It is in virtue¹⁵ of one and the same cause, therefore, that all the arteries of the body pulsate, viz., the contraction of the left ventricle; in the same way as the pulmonary artery pulsates¹⁶ by the contraction of the right ventricle.

Finally, that the pulses of the arteries are due to the impulses of the blood from the left ventricle, may be illustrated¹⁷ by blowing into a glove, when the whole of the fingers will be found to become distended at one and the same time, and in their tension to bear some resemblance to the pulse. For in the ratio of the tension is the pulse of the heart, fuller, stronger, and more frequent as that acts more vigorously, still preserving the rhythm and volume, and order of the heart’s contractions¹⁸. Nor is it to be expected that because of the motion of the blood, the time at which the contraction of the heart takes place, and that at which the pulse in an artery (especially a distant one) is felt, shall be otherwise than simultaneous: it is here the same as in blowing up a glove or bladder; for in a plenum (as in a drum, a long piece of timber, etc.) the stroke and the motion occur at both extremities¹⁹ at the same time. Aristotle,3 too, has said, “the blood of all animals palpitates within their veins²⁰ (meaning the arteries), and by the pulse is sent everywhere simultaneously²¹.” And further,4 “thus do all the veins pulsate together and by successive strokes, because they all depend upon the heart; and, as it is always in motion, so are they likewise always moving together, but by successive movements.” It is well to observe with Galen, in this place, that the old philosophers called the arteries veins. I happened upon one occasion to have a particular case under my care, which plainly satisfied me of the truth: A certain person was affected²² with a large pulsating²³ tumour²⁴ on the right side of the neck, called an aneurism, just at that part where the artery descends²⁵ into the axilla, produced by an erosion of the artery itself, and daily increasing in size; this tumour was visibly distended as it received the charge of blood brought to it by the artery, with each stroke of the heart; the connexion of parts was obvious when the body of the patient came to be opened after his death. The pulse in the corresponding arm was small, in consequence of the greater portion of the blood being diverted into the tumour and so intercepted²⁶.

Whence it appears that whenever the motion of the blood through the arteries is impeded²⁷, whether it be by compression or infarction, or interception²⁸, there do the remote divisions of the arteries beat less forcibly, seeing that the pulse of the arteries is nothing more than the impulse or shock of the blood in these vessels²⁹.

1 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》

2 dissection   

n.分析；解剖

参考例句：

• A dissection of your argument shows several inconsistencies.对你论点作仔细分析后发现一些前后矛盾之处。
• Researchers need a growing supply of corpses for dissection.研究人员需要更多的供解剖用的尸体。

3 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》

4 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。

5 distended   

v.（使）膨胀，肿胀( distend的过去式和过去分词 )

参考例句：

• starving children with huge distended bellies 鼓着浮肿肚子的挨饿儿童
• The balloon was distended. 气球已膨胀。 来自《现代英汉综合大词典》

6 pulsate   

v.有规律的跳动

参考例句：

• Hues of purplish,rose and amber begin to pulsate in the sky.淡紫色的、玫瑰色的和琥珀色的色调开始在天空中微微颤动起来。
• Building facades pulsate with millions of lights and glowing neon display.在千万灯光和霓虹灯的照耀下，建筑物的外墙规律地闪动着。

7 punctured   

v.在（某物）上穿孔( puncture的过去式和过去分词 )；刺穿（某物）；削弱（某人的傲气、信心等）；泄某人的气

参考例句：

• Some glass on the road punctured my new tyre. 路上的玻璃刺破了我的新轮胎。 来自《简明英汉词典》
• A nail on the road punctured the tyre. 路上的钉子把车胎戳穿了。 来自《现代汉英综合大词典》

8 spouting   

n.水落管系统v.（指液体）喷出( spout的现在分词 )；滔滔不绝地讲；喋喋不休地说；喷水

参考例句：

• He's always spouting off about the behaviour of young people today. 他总是没完没了地数落如今年轻人的行为。 来自《简明英汉词典》
• Blood was spouting from the deep cut in his arm. 血从他胳膊上深深的伤口里涌出来。 来自《简明英汉词典》

9 forth   

adv.向前；向外，往外

参考例句：

• The wind moved the trees gently back and forth.风吹得树轻轻地来回摇晃。
• He gave forth a series of works in rapid succession.他很快连续发表了一系列的作品。

10 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。

11 ribs   

n.肋骨( rib的名词复数 )；（船或屋顶等的）肋拱；肋骨状的东西；（织物的）凸条花纹

参考例句：

• He suffered cracked ribs and bruising. 他断了肋骨还有挫伤。
• Make a small incision below the ribs. 在肋骨下方切开一个小口。

12 opposition   

n.反对，敌对

参考例句：

• The party leader is facing opposition in his own backyard.该党领袖在自己的党內遇到了反对。
• The police tried to break down the prisoner's opposition.警察设法制住了那个囚犯的反抗。

13 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。

14 bellows   

n.风箱；发出吼叫声，咆哮（尤指因痛苦）( bellow的名词复数 )；（愤怒地）说出（某事），大叫v.发出吼叫声，咆哮（尤指因痛苦）( bellow的第三人称单数 )；（愤怒地）说出（某事），大叫

参考例句：

• His job is to blow the bellows for the blacksmith. 他的工作是给铁匠拉风箱。 来自辞典例句
• You could, I suppose, compare me to a blacksmith's bellows. 我想，你可能把我比作铁匠的风箱。 来自辞典例句

15 virtue   

n.德行，美德；贞操；优点；功效，效力

参考例句：

• He was considered to be a paragon of virtue.他被认为是品德尽善尽美的典范。
• You need to decorate your mind with virtue.你应该用德行美化心灵。

16 pulsates   

v.有节奏地舒张及收缩( pulsate的第三人称单数 )；跳动；脉动；受（激情）震动

参考例句：

• My life pulsates with every movment of my country. 我的一生是随着祖国的脉搏而跳动的。 来自辞典例句
• The sick cow frequently attempts urination and pulsates the urethra over the ischium arch. 病牛频频企图排尿，搏动坐骨弓上的尿道。 来自辞典例句

17 illustrated   

adj. 有插图的，列举的 动词illustrate的过去式和过去分词

参考例句：

• His lecture was illustrated with slides taken during the expedition. 他在讲演中使用了探险时拍摄到的幻灯片。
• The manufacturing Methods: Will be illustrated in the next chapter. 制作方法将在下一章说明。

18 contractions   

n.收缩( contraction的名词复数 )；缩减；缩略词；（分娩时）子宫收缩

参考例句：

• Contractions are much more common in speech than in writing. 缩略词在口语里比在书写中常见得多。 来自《简明英汉词典》
• Muscle contractions are powered by the chemical adenosine triphosphate(ATP ). 肌肉收缩是由化学物质三磷酸腺苷(ATP)提供动力的。 来自辞典例句

19 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

20 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》

21 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。

22 affected   

adj.不自然的，假装的

参考例句：

• She showed an affected interest in our subject.她假装对我们的课题感到兴趣。
• His manners are affected.他的态度不自然。

23 pulsating   

adj.搏动的，脉冲的v.有节奏地舒张及收缩( pulsate的现在分词 )；跳动；脉动；受（激情）震动

参考例句：

• Lights were pulsating in the sky. 天空有闪烁的光。
• Spindles and fingers moved so quickly that the workshop seemed to be one great nervously-pulsating machine. 工作很紧张，全车间是一个飞快的转轮。 来自子夜部分

24 tumour   

n.(tumor)(肿)瘤，肿块

参考例句：

• The surgeons operated on her for a tumour.外科医生为她施行了肿瘤切除手术。
• The tumour constricts the nerves.肿瘤压迫神经。

25 descends   

v.下来( descend的第三人称单数 )；下去；下降；下斜

参考例句：

• This festival descends from a religious rite. 这个节日起源于宗教仪式。 来自《简明英汉词典》
• The path descends steeply to the village. 小路陡直而下直到村子。 来自《简明英汉词典》

26 intercepted   

拦截( intercept的过去式和过去分词 )； 截住； 截击； 拦阻

参考例句：

• Reporters intercepted him as he tried to leave the hotel. 他正要离开旅馆，记者们把他拦截住了。
• Reporters intercepted him as he tried to leave by the rear entrance. 他想从后门溜走，记者把他截住了。

27 impeded   

阻碍，妨碍，阻止( impede的过去式和过去分词 )

参考例句：

• Work on the building was impeded by severe weather. 楼房的施工因天气恶劣而停了下来。
• He was impeded in his work. 他的工作受阻。

28 interception   

n.拦截；截击；截取；截住，截断；窃听

参考例句：

• Aerial photography can provide valuable information on precipitation, evapotraspiration, interception, and runoff. 航空摄影可提供有关降水量、蒸发蒸腾量、入渗和径流量的有价值的资料。
• Light interception and distribution in hedgerow orchards with different alleyway widths is indicated in Fig. 56. 图56显示篱壁果园不同行间宽度的光能截取和分配的情况。

29 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》