Large size of aorta probably due to fact that it not merely carries the pneuma received from the lungs, but also some of the blood which percolates through septum from right ventricle.
The aortic and pulmonary valves are laid down in the ventral aorta, before it is divided into aorta and pulmonary artery, as four endocardial cushions; anterior, posterior and two lateral.
In addition to these the beginning of the ventral aorta is often thickened and expanded to form a bulbus arteriosus, which is non-contractile, and, strictly speaking, should rather be described with the arteries than with the heart.
Ligature of the aorta may or may not cause a rise in the liver capillary pressure, and it has been shown that if the pressure rises there is an increased lymph-flow from the liver and conversely.
The duct runs up on the right of the aorta through the posterior mediastinum and then traverses the superior mediastinum to the left of the oesophagus.
In fishes, for instance, there is a large subvertebral lymph sinus surrounding the aorta and another within the spinal canal.
Ligature of the aorta may result in either an increased or decreased flow of direct lymph.
The weight in the stomach, particularly if considerable liquid has been taken, seems to press upon the abdominal aorta and interferes, to some extent at least, with the circulation to the legs.
Note the condition of the aorta above the heart, whether it is dilated, atheromatous, or shows calcareous deposits.
Having passed the hand over the arch of the aorta and noticed whether there is any evidence of aneurism or dilatation, we grasp the heart firmly by the apex, raising and drawing it forward.
The heart is usually changed in color and consistence, with the left ventricle contracted and the aorta empty, while the right ventricle and pulmonary arteries are dilated and engorged.
The charge had struck him in the breast, centring over a space of three or four inches, but one shot had penetrated the aorta over the attachment of the sigmoid valves, and another had traversed the entire wall of this vessel.
The pulmonary artery of the healthy infant is larger than the aorta by not more than four millimeters.
The impulse transmitted to a tumor resting upon the abdominal aorta may be lessened by placing the patient upon his hands and knees.
Gastric cancer when it presses upon the aorta may simulate aneurism, not only by the presence of pulsation, but also by the existence of a bruit over the tumor.
Pyloric cancers which receive a marked pulsation from the aorta sometimes raise a suspicion of aneurism, but the differential diagnosis is not usually one of great difficulty.
Perforation of theaorta or pulmonary artery is often followed by sudden death from hemorrhage, and of the lungs by rapid death from pneumonitis.
Cases have been reported of death from rupture of an aneurism of the aorta while at stool, and J.
The arch of the aorta was atheromatous and contained a thrombus.
The retro-peritoneal glands along theaorta were enlarged, soft, and of a reddish-gray color.
In aneurism of the aorta or coeliac axis the tumor may present in the epigastrium and produce analogous pressure symptoms.
In these cases there may be dilatation of the aorta from paralysis of vaso-motor nerves analogous to the dilatation of the carotid and temporal arteries in certain forms of migraine (Rosenbach).
In order that it may not itself be absolutely without heat, blood-vessels from the aorta end in the membrane which surrounds the brain.
Thus he is charged with having represented that the arteries contained nothing but air; that the aorta arose from the right ventricle; that the heart did not beat in any other animal but man; that reptiles had no blood, etc.
To give you an idea of this cavalry encounter, it is sufficient to say that Colonel Vandoni, at the head of the Aorta regiment he commands, charged fourteen times during the short period of four hours.
The aorta divided itself, at its arch, into two branches, which received the trachea between them, and again united, exactly fitting the organ they received.
A sample of labeled red blood cells is introduced into a vein, and the recording device counts the radioactivity appearing in the aorta as a function of time.
It is penetrated by the oesophagus on its way to the stomach, by the aorta conveying blood toward the lower extremity, and by the ascending vena cava, or vein, on its way to the heart.
T, T, A branch of the aorta to the upper extremities.
The divisions and subdivisions of theaorta terminate in capillary vessels, represented by 14, 14.
In its ascent, it lies anterior to the spine, and by the side of the aorta and oesophagus.
The semilunar valves (20) prevent the reflow of blood from the aorta to the left ventricle.
The AORTA proceeds from the left ventricle of the heart, and contains the pure, or nutrient blood.
The valves at the commencement of the aorta and pulmonary artery, permit the blood to flow from the ventricles into these vessels, but prevent its returning.
A transverse section through the dorsal region of a forty-five hours' embryo; ao, aorta with a few blood-corpuscles.
And how should the semiluftars hinder the regress of spirits from the aortaupon each supervening diastole of the heart?
It would therefore appear that the function of the valves in the veins is the same as that of the three sigmoid valves which we find at the commencement of the aorta and pulmonary artery, viz.
Mullings have given me an account of the state of the heart and aorta in the bodies of 25 men, aged 40 and upwards, examined in the post-mortem room of Charing Cross Hospital, who had died from accident or suicide.
It is also one of the physical signs of syphilitic and traumatic affections of the aorta and aortic valves and of remote endocarditis.
Of syphilis and the havoc that it works on heart, aorta and the vascular system generally, but particularly within the nervous system, I need not speak.
The average age was 531/2 years, and the aorta presented some degree of atheroma in half the cases.
Aneurism of the anterior aorta may be situated very closely to the heart or in the arch, and it is very seldom that we can distinguish it from disease of the heart.
The second sound follows quickly after the first and occurs during rebound of blood in the arteries, causing pressure in the aorta and tensions of the valves guarding its opening into the left ventricle.
The openings between the chambers of each side and into the aorta are guarded by valves.
The arteries, commencing in two great trunks, the aorta and the pulmonary artery, undergo division, as in the branching of a tree.
Occasionally the fibrin may be seen lining one of the cavities of the heart, like a false endocardium, or else forming an additional coat to the aorta or other large vessels without producing much obstruction.
In some cases they may even be recognized with positive accuracy, as when the vessels which supply the posterior extremities are affected by the blocking up of the posterior aorta or its ramifications.
At the mouth of the aorta and at the mouth of the pulmonary artery is an arrangement of valves in each case which prevents the reflux of blood into the ventricles.
When the aneurism occurs in the posterior aorta no diagnostic symptoms are appreciable; when it occurs in the internal iliac arteries an examination per rectum will reveal it.
In a few instances constriction of the aorta has produced death.
After the contraction of the ventricles the heart is again in momentary repose and is being filled with blood, while the valves in the aorta and pulmonary artery close to prevent the return of blood into the ventricles.
Arteries are also obstructed by the breaking off of particles of a plug or clot, partly obstructing the aorta or other large artery.
The posterior aorta coming from the heart passes backward and gives rise to the internal iliac arteries, and of these the umbilical arteries are branches.
Aneurysm of the aorta must in all cases of dysphagia be excluded, for the dilated aorta may be the sole cause of the condition, and its presence contraindicates esophagoscopy because of the liability of rupture.
After the levels of the aorta and left bronchus are passed the lumen of the esophagus seems to have a tendency to disappear anteriorly.
It is only when the tube-mouth is directed against the left anterior wall that the actively pulsating aorta is felt.
From seventy to eighty times a minute the aorta is normally forcibly expanded to accommodate the charge of the ventricle.
Associated with such changes in theaorta and large branches is marked sclerosis of the smaller arteries.
Note the contraction of the openings of the large branches, the rough appearance of the aorta and the greater degree of sclerosis of the upper two-thirds, i.
So far as the anatomical lesions in the aorta and branches are concerned, there is much uniformity even though the etiologic factors have been diverse.
In order to accommodate this sudden accession of fluid, the aorta must expand.
Then too, there may be marked changes at the root of the aorta leading to sclerosis of the coronary vessels alone, and the first intimation that the patient or any one else has that there is disease, may be an attack of angina pectoris.
The thoracic aorta stands the brunt of the high pressure, and this combined with the poisonous action of the drug or drugs, results in the formation of a fusiform aneurysmal dilatation which stops at the diaphragmatic opening.
Most commonly there are nodules and plaques in the aorta and large branches together with thinning and sacculation of other portions of the vessels' walls.
The small whitish or yellowish plaques so frequently seen on the aorta and its main branches, may occur at any age, and have seemingly no great significance.
The volume output per unit of time is greatly increased, the arch of the aorta is dilated, and the pulse is large.
Aschoff's studies of the aorta show that, "in infancy the elastic laminae of the media stand out sharply defined, well separated from each other by the muscle layers, which are well developed.
Other large vessels which branch from the aorta also have a part in this steady propulsion of blood.
The aorta and the large branches are distributing tubes only.
Where being made spirituous it is sent by theaorta to impart life to the whole body.
His jugular arteries enlarged to the size of a thumb, looked like the aorta itself, or they were as large as the descending aorta: they had pulsated violently and appeared like two long aneurysms.
From this he wishes it to be understood that the blood passes by obvious and open passages from the vena cava into the aorta through the cavities of the ventricles.
In the dead body I found the heart and aorta so much gorged and distended with blood that the cavities of the ventricles equalled those of a bullock's heart in size.
The left ventricle sends its charge into the aorta and through this by the arteries to the body at large.
The semilunar valves surround the opening from the left ventricle into the aorta and keep the blood from flowing back.
But the clot, if one form, may be dislodged and driven forward, in which event it may lodge in any one of the numerous branches from the aorta and produce results more or less serious, possibly fatal.
You will see, therefore, that as your aorta and your breast are now held in rigid relation to each other by the stiletto, the chest, with every inhalation, pulls the aorta forward out of place about half an inch.
Any unusual exercise or excitement produces stronger and quicker heart-beats, and increases the strain on the adhesion of the aorta to the weapon.
As it is, not a drop of blood has escaped from the aortainto the thoracic cavity.
If I should withdraw the weapon the blood would rush from the two holes in the aorta and you would soon be dead.
A fright, fall, a jump, a blow on the chest--any of these might so jar the heart and aortaas to break the hold.
As judged by lesions of the aorta and iliac arteries in dissecting subjects, the conclusion that arteritis and resultant disorders are of rather frequent occurrence, is logical.
Exposure of aorta and its branches, showing location of thrombi in numerous places.
Aorta and Its Branches Showing Location of Thrombi 210 Fig.
Cutting through the mesentery supporting the kidney laterally, the dorsal aorta is exposed, and on either side of it the sympathetic chain and rami communicantes, often tinged with black pigment.
There is no -distinct- heart, but the whole of the cardiac aorta is contractile, and at the bases of the aortic arches that run up the bars there are contractile dilatations that assist in the propulsion of the blood.
Cut away the heart and oesophagus; run a seeker up the dorsal aorta and cut along it from the ventral side to subclavian and efferent branchial arteries.
Posteriorly the dorsal aorta forks into two common iliac arteries (right and left) supplying the hind limbs.
Figure 1); it then runs over the heads of the ribs in the thorax and close beside the dorsal aorta in the abdominal region.
The dorsal aorta passes round on each side of the oesophagus, as indicated by the dotted lines in Figure 2, Sheet 11, and meets its fellow dorsal to the liver.
Run a seeker from the dorsalaorta to the efferent branchials.
It is, of course, paired, and is easily found in dissection by lifting the dorsal aorta and looking at its mesentery.
The aortanow curves round to the dorsal middle line, and runs down as seen in Figure 1, Sheet 1 (d.
Note the dorsal aortaand vena cava and their connexions behind.
Dorsal to the pharynx, as in fishes, there is a pair of dorsal aorta (d.
But unhappily he suffers from an enlarged aorta and it is impossible for him to take his place in our line of defences, though that impossibility has caused him the sorrow of his life.
Most of the reports which he had received previous to his entrance had concurred in describing the dissatisfaction of the troops, who for some time had had to contend with bad roads, bad weather, and all aorta of privations.
Bonaparte, who wore his gray greatcoat, and had his whip in his hand, appeared somewhat disappointed at not seeing any one come from the valley of Aorta to inform him of the taking of the fort of Bard.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "aorta" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: artery; capillary; vein
