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Of these branches the chief are the coeliac artery, which subdivides into three great branches, one each to supply the stomach, the liver, and the spleen; then the renal arteries, one to each kidney; and next two others, the mesenteric arteries, to the intestines.
Second, in so-called plexuses, occupying different positions in the cavity of the trunk, and standing in especial relation to various organs; the solar or coeliac plexus to the stomach, liver, and spleen; the two renal plexuses to the kidneys; the mesenteric plexuses to the intestine; finally, on each side of the pelvis, the hypogastric plexus to the bladder, uterus, and ovaries the so-called genito-urinary organs.
For the blood entering the mesentery by the coeliac artery, and the superior and inferior mesenteries, proceeds to the intestines, from which, along with the chyle that has been attracted into the veins, it returns by their numerous ramifications into the vena portae of the liver, and from this into the vena cava, and this in such wise that the blood in these veins has the same colour and consistency as in other veins, in opposition to what many believe to be the fact.
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