The opening of the sinus venosus is to the right of this shell, that of the pulmonary vein to the left.
The sinusvenosus receives the blood from the great veins (ductus Cuvieri and hepatic veins).
This vessel grows very rapidly up to its connection with the ductus venosus and soon exceeds the right umbilical vein in size (Fig.
Beyond the ductus venosus on the other hand the proximal segment of the left umbilical vein diminishes in size, and loses its independent character by incorporation in the hepatic circulation.
The terminations of the ductus venosus and of the venae hepaticae revehentes undergo a number of secondary changes in relative position.
Heart and ventral body-wall removed to show sinus venosus and entering veins.
While at first the ductus venosus communicates throughout its entire length with the meshwork of the hepatic capillary system, a separation into two segments, i.
With the further development of the liver the direct connection of the distal segment of the vitelline veins with the sinus venosus becomes lost, the intermediate segment being entirely broken up into an intrahepatic network (Fig.
They are veins of the body walls, emptying cephalad of the liver, directly into the ducts of Cuvier, and through them into the sinus venosus of the heart.
When the postcava develops fully the hepatic segment of this vessel also joins the terminal part of the ductus venosus (Fig.
The two forks embrace between them the omphalo-mesenteric or vitelline veins just before they empty into the sinus venosus of the heart.
The same obtains in the case of the ductus venosus continued from the umbilical vein (umbilical fissure and fissure of ductus venosus of adult liver).
A) and along the fissure for the ductus venosus (Fig.
The blood after traversing the capillary system of the liver is collected by hepatic veins, which form a dilated hepatic sinus emptying into the sinus venosus of the heart.
The external layer of decidua is called decidua vera; the internal or reflected portion is called the decidua reflexa, having received this appellation from its discoverer, Dr.
Some of them which I have found more deeply embedded in the decidua were completely closed sacs.
The form of the gravid uterus differs also from that in the unimpregnated state in other respects, and this difference appears to depend in great measure upon its increase of size, and upon the form of the cavities which it occupies.
The course which the decidual vessels take on coming from the inner surface of the uterus is admirably adapted to render the attachment of this membrane to it as firm as possible.
Baer considers that at a later period the connexion between the decidua and mucous membrane becomes so intimate, that it is impossible to separate the former without also separating the latter from the fibrous tissue of the uterus.
These strain out the impurities arising from waste of tissues, after which the blood is carried back to the sinus venosus through the cardinal vein.
The portal vein carries blood to the liver, where nutriment may be stored up, and from thence it flows back to the sinus venosus through a very short thin-walled vessel, the hepatic sinus.
From the sinus venosusit passes forward into a large chamber, the auricle.
According to Rathke the original trunk connecting the allantoic vein directly with the heart through the liver is aborted, and the ductus venosus Arantii is a secondary connection established in the latter part of foetal life.
Ca) cardinal veins, joining on each side to form the short transverse ductus Cuvieri (DC), both of which unite with the sinus venosus close to the heart.
When the two ductus Cuvieri, leading transversely from the sinus venosus to the cardinal veins, become developed, a horizontal septum, shewn on the right side in fig.
This, starting from the sinus venosus not far from the heart, is on the fifth day a short trunk running backward in the middle line below the aorta, and speedily losing itself in the tissues of the Wolffian bodies.
This, at its entrance into the liver, partly breaks up into the venae advehentes, and partly continues as the ductus venosus (D.
From the ductus venosus there is given off a vein which quickly divides into two branches.
The vena cava inferior joins the continuation of the ductus venosus in front of the liver, and, as it becomes more important, it receives directly the hepatic veins which originally brought back blood into the ductus venosus.
The sinus venosus in Mammals becomes completely merged into the right auricle, and the systemic division of the truncus arteriosus is apparently not homologous with that in Birds.
Before the establishment of the vena cava inferior, the venae revehentes, carrying back the blood which circulates through the hepatic capillaries, join the ductus venosus close to its exit from the liver.
The main trunk is however never completely aborted, as in the embryos of other types, but remains as the ductus venosus Arantii.
The blood from the liver is brought back to the sinus venosus by veins known as the hepatic veins, which, like the hepatic capillary system, are derivatives of the subintestinal vessel.
From the vascular area part of the blood returns directly to the sinus venosus by the main lateral trunks of the vitelline veins (R.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "venosus" in a variety of sentences. We hope that you will now be able to make sentences using this word.
