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For were it not for this lazy trade of usury, money would not he still, but would in great part be employed upon merchandizing; which is the vena porta of wealth in a state. The second, that it makes poor merchants. For, as a farmer cannot husband his ground so well, if he sit at a great rent; so the merchant cannot drive his trade so well, if he sit at great usury.
For all states of the lungs depend on the blood from the heart and from the vena cava and aorta; and respirations, which take place in the bronchial branches, proceed in accordance with the state of those vessels; for when the flow of the blood stops, respiration stops.
For the heart can be conjoined to the clustering vesicles of the bronchia by blood sent out from itself, and also by blood sent out not from itself but from the vena cava and the aorta. Thereby the respiration of the body can be separated from the respiration of the spirit; but when blood from the heart alone acts the respirations cannot be separated.
From this it will be understood that in the human embryo, and in the embryos of animals in which the communications are not closed, the same thing happens, namely, that the heart by its motion propels the blood by obvious and open passages from the vena cava into the aorta through the cavities of both the ventricles, the right one receiving the blood from the auricle, and propelling it by the pulmonary artery and its continuation, named the ductus arteriosus, into the aorta; the left, in like manner, charged by the contraction of its auricle, which has received its supply through the foramen ovale from the vena cava, contracting, and projecting the blood through the root of the aorta into the trunk of that vessel.
And this is so, because in the foetus, as already said, whilst the blood is not passing through the lungs from the right to the left cavities of the heart, it flows by the foramen ovale and ductus arteriosus directly from the vena cava into the aorta, whence it is distributed to the whole body. Both ventricles have, therefore, the same office to perform, whence their equality of constitution.
But this blood, instead of flowing directly to the heart, is passed through the portal vein to the liver, where it enters a second set of capillaries and is brought very near the liver cells. From the liver it is passed through the hepatic veins into the inferior vena cava, and by these it is emptied into the right auricle.
Sanguis mane in te, Sicut Christus fuit in se; Sanguis mane in tua vena Sicut Christus in sua poena; Sanguis mane fixus, Sicut Christus quando fuit crucifixus, Jesus, that was of a Virgin born, Was pricked both with nail and thorn; It neither wealed nor belled, rankled nor boned In the name of Jesus no more shall this. Or, thus:
And Manu begat ten other children named Vena, Dhrishnu, Narishyan, Nabhaga, Ikshvaku, Karusha, Saryati, the eighth, a daughter named Ila, Prishadhru the ninth, and Nabhagarishta, the tenth. They all betook themselves to the practices of Kshatriyas. Besides these, Manu had fifty other sons on Earth. But we heard that they all perished, quarrelling with one another.
By that single snail-like motion, equally divided as you see, and a fivefold infoliature, movable at every inward meeting, such as is the vena cava where it enters into the right ventricle of the heart; just so is the flowing of this fountain, and by it a harmony ascends as high as your world's ocean.
The veins had their origin in the liver; the superior vena cava communicated with the right heart, and, as Galen taught, some blood was distributed to the lungs; but the two systems were closed, though Galen believed there was a communication at the periphery between the arteries and veins.
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