How do the auricles and ventricles contract and dilate?
The valves in the heart permit the blood to flow from the auricles to the ventricles, but prevent its reflowing.
The VEINS are the vessels which return the blood to the auricles of the heart, after it has been circulated by the arteries through the various tissues of the body.
The valvular structure of the auricles was congested and granular.
There was considerable attenuation of the walls of both auricles and ventricles.
Both auricles of the heart were enlarged, and distended with exceedingly dark blood.
Blood enters the auricles from the veins because the muscles of that part of the heart relax; this allows the space within the auricles to fill.
Communication between auricles and ventricles is guarded by little flaps or valves.
The heart has three chambers, two auriclesand one ventricle.
From the minute termination of the arteries, begins a second set of vessels, the veins, which, having a contrary course, return the blood from every part of the body into the auricles of the heart.
The last kind of heart is formed of four cavities, two auricles and two ventricles, and is the most perfect apparatus as it is found in man, and quadrupeds generally.
Having two auricles placed at the sides of the umbones, as in Pecten, fig.
Both auricles of the heart (with some exceptions) were left intact.
The gill-filaments are all connected with a long vein, and, being hollow, admit the blood, which is aerated by close contact with the water and is then returned to another vein in immediate connection with the auricles of the heart.
In specimens from Cheshire, Connecticut, and in some from Indiana, the auricles are drawn out into slender points, in one instance fully four inches long.
Colden long ago described the auricles as being "also often acuminate.
These auricles are scantily developed in small fronds; but in larger ones they are more or less prominent, making the base of the frond either cordate or hastate.
The wings of the stalk widen out into a wedge-shaped base, which is sunken in a sinus between two basal auricles of the frond.
Young Bolina seen from the broad side, with rudimentary auriclesand lobes; magnified.
These so-called auricles are in fact organs of the same kind as the larger lobes, though less developed.
Bolina, are formed by the elongation of the oral end of the body, the auricles becoming more conspicuous at the same time (Fig.
The four longest ones are opposite each other on those sides of the body where the larger lobes are developed, the four short ones being in pairs on the sides where the auricles are placed.
But as their development goes on, the tentacles stretch out into longer, more delicate flexible organs, while the auricles remain short and compact throughout life.
Both of the auricles and both of the ventricles contract at the same, time, the ventricular contraction following closely upon the contraction of the auricles.
The contraction of the auricles is quickly followed by that of the ventricles, and then a slight pause occurs; this takes place in regular rhythmical order during health.
The veins emptying into the auricles are not capable of closure, but the posterior vena cava has an imperfect valve at its aperture.
The two auricles are similar in structure and form.
Wounds of the auricles are generally fatal immediately, especially if the cavity is extensively laid open.
It is the general opinion that wounds of the auricles are most rapidly fatal, next those of the right ventricle, and lastly those of the left ventricle.
On cutting into the uterus, however, and taking out one of the young, I found both auricles and ventricles of its heart, contracting most vigorously, though the mother had now been dead upwards of twenty minutes.
The auricles are expanded-rounded and are usually ground along the edges.
The circulation is double, the heart being composed of two distinct auricles and two distinct ventricles.
This will inject the arterial system, and with increased pressure the injecting mass may be forced through the valves of the heart, thus passing into the auricles and throughout the venous system.
The heart is always three-chambered, consisting of the right and left auricles and a single ventricle.
The merest undergraduate could not have felt a sillier flutter than that which agitated both auricles and ventricles of my central vascular organ--as a Senior Proctor I must really draw the line at speaking outright of my heart.
It is divided internally into cavities, called auriclesand ventricles; from which vessels proceed to convey the blood to the different parts of the body.
There were in two cases white, firm, fibrinous heart-clots extending through both ventricles and auricles and into the vessels leading to and from the heart.
Decolorized clots in heart, extending from ventricles into auricles of both sides.
Even after twelve hours both auricles responded to the same stimulus, though the ventricles remained motionless.
The auriclesmay be considered as the reservoirs or receivers of the blood and the ventricles as the pump chambers.
The upper compartments are called auricles and the lower ones ventricles.
The heart of the rabbit is divided by partitions into four chambers: two upper thin-walled ones, the auricles (au.
But, as a matter of fact, the ventricles in fowl and rabbit are separated first, and the separation of the auricles follows, and is barely complete at birth.
The auricles and the plantae of the hind legs become particularly wet from this source, since fluid is squeezed from the wet pollen when it is compressed between the auricles and the distal ends of the tibiae.
Little pollen gets by the sticky surfaces of the combs of the plantar or past the auricles without becoming thoroughly moist.
As soon as the beat of the ventricles is over and the ventricular muscle relaxes, the blood which has accumulated in the auricles presses the intake valve open and blood begins to flow through it directly into the ventricle.
The weight of the blood that is accumulated in the auricles during the beat of the ventricle is more than sufficient to force the valve open and allow the blood to flow on through into the ventricle.
Both sides of the heart work exactly together, the two auricles beating simultaneously, and the two ventricles.
Open the auricles and observe the division between them and the openings of the veins passing into them.
Make a section through the auricles and ventricle noting the thick muscular walls of the ventricle and the valves between it and the auricles.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "auricles" in a variety of sentences. We hope that you will now be able to make sentences using this word.
