By collateral circulation is meant the anastomoses of arteries, or veins through a side branch.
In the limbs and arms the anastomoses are more numerous and of larger size around the joints.
The anastomoses of these arteries with their opposite fellows along the median line, are much less frequent than those of the arteries of the neck and head.
The branches of the main arteries of one side form numerous anastomoses in the muscles and in the cellular and adipose tissue generally.
The branches of the systemic aorta form frequent anastomoses with each other in all parts of the body.
From its upper end arises the recurrent branch which anastomoses in front of the knee with the articular branches of the popliteal artery.
The superficial palmar arch of the ulnar vessel anastomoseswith the deep arch of the radial vessel.
These veins are at first connected by transverse anastomoses with the posterior cardinals, but, on the disappearance of the front part of the latter, the whole of the blood from the intercostal veins falls into the posterior vertebral veins.
On its way it receives, on its outer side, numerous branches from the venous network, which connect by their anastomoses the posterior branch of the vitelline vein and the sinus terminalis.
The degree of mechanical obstruction is determined by the nature of the thrombus, whether parietal or obstructing, and by that of the vessel, whether provided with anastomoses sufficient to permit a compensatory collateral circulation or not.
When the embolus reaches a point beyond which it cannot pass, the resulting disturbance depends essentially, as shown by Cohnheim, upon the presence or absence of arterial anastomoses beyond the place of obstruction.
If the obstructed artery is not terminal, the embolus may produce no further disturbance, the collateral supply of blood through the anastomoses sufficing for the nutrition and function of the part.
In most parts of the body the venous anastomoses are so numerous that the obstruction of a vein is readily compensated for through the collateral venous circulation.
Anastomoses of veins through minute branches are made use of to convey the blood of the obstructed portal circulation into the general venous system, and to this end become greatly enlarged.
The veins of the abdominal parietes, which in the normal state are invisible or at least not prominent, and which form anastomoses with the portal, when the obstruction occurs dilate, sometimes to a remarkable extent.
Here it enters the interior of the bone (the semilunar sinus) and anastomoses with the corresponding artery of the opposite side.
The Middle Branch descends between the artery and the vein, and freelyanastomoses with the two other branches.
In this manner a vascular circle, the circle of Willis, is formed, which permits of freedom of the arterial circulation by the anastomoses between arteries not only on the same side, but on opposite sides of the mesial plane.
Application of this to question of contents of arteries; anastomoses of arteries and veins.
If you will kill an animal by cutting through a number of its large arteries, you will find the veins becoming empty along with the arteries: now, this could never occur if there were not anastomoses between them.
All three rings bear small scattered spines, which are irregularly branched, and by anastomoses of the thread-like branches form small irregular meshes along the rings.
Spongy framework of the spherical bivalved mantle very dense and thick, produced by very numerous, irregular anastomoses of the lateral and terminal branches, which arise from the hollow tubes.
Very numerous radial pseudopodia arise everywhere from the sarcomatrix and run to the surface of the calymma, usually forming a rich network in it by means of numerous branches and anastomoses (compare Pl.
From the edges of all three rings are developed small branches, which by irregular ramification and anastomoses form small irregular meshes along the rings.
A twig from the middle division of the femoral nerveanastomoses with the typical branch to M.
IV and also gives off a twig that anastomoses with the posterior division (left leg) or with the first branch of the posterior division (right leg).
In three cases, a twig from the middle division anastomoseswith the branch of the anterior division supplying M.
In two legs, a twig from the anteriormost branch of the middle division of the femoral nerve anastomoses with the typical branch to M.
It is possible, that when the motion of the lymphatic becomes retrograde in some diseases, that blood may obtain a passage into it, where it anastomoses with the vein, and thus be poured into the intestines.
In the absorbent system there are many anastomoses of the vessels, which seem of great consequence to the preservation of health.
These anastomoses are discovered by dissection to be very frequent between the intestinal and urinary lymphatics, as mentioned by Mr. Hewson, (Phil.
In the infant cortico-spinal anastomoses are awanting, and volitional power is dependent on their establishment and development.
But a day comes when the formation of cortico-bulbar or cortico-spinal anastomoses renders possible the interaction of higher and lower centres; respiration may be made quicker or slower; the eyelid may be closed less rapidly, more often.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "anastomoses" in a variety of sentences. We hope that you will now be able to make sentences using this word.
