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"I began to think whether there might not be A MOVEMENT, AS IT WERE, IN A CIRCLE. Now this I afterwards found to be true; and I finally saw that the blood, forced by the action of the left ventricle into the arteries, was distributed to the body at large, and its several parts, in the same manner as it is sent through the lungs, impelled by the right ventricle into the pulmonary artery, and that it then passed through the veins and along the vena cava, and so round to the left ventricle in the manner already indicated."
Gratified, Prithu, the royal son of Vena, possessed of great prowess, gave unto Suta the land lying on the sea-coast, and unto Magadha the country since known as Magadha. We have heard that the surface of the earth had before been very uneven. It was Prithu who made the terrestrial surface level. In every Manwantara, the earth becomes uneven.
Vena, a slave of wrath and malice, became unrighteous in his conduct towards all creatures. Uttering mantras the while, those Rishis pierced the right thigh of Vena. Thereupon, from that thigh, came out a short-limbed person on earth, resembling a charred brand, with blood-red eyes and black hair. The great Rishis then pierced the right arm of Vena.
For these do but corrupt the stream, the other corrupteth the fountain. So with Solomon, Fons turbatus, et vena corrupta, est justus cadens in causa sua coram adversario. The office of judges may have reference unto the parties that use, unto the advocates that plead, unto the clerks and ministers of justice underneath them, and to the sovereign or state above them.
Therefore, O great king, give us boons after our own hearts, through which we may, for ever, obtain gratification and joy." Unto them Prithu, the son of Vena, said, So be it. Then taking up his Ajagava bow and some terrible arrows the like of which existed not, he reflected for a moment. He then addressed the Earth, saying, "Coming quickly, O Earth! Yield to these the milk they desire.
The right ventricle sends its charge into the lungs by the vessel which is called vena arteriosa, but which in structure and function, and all other respects, is an artery. The left ventricle sends its charge into the aorta, and through this by the arteries to the body at large.
These were Puru, Kuru, Yadu, Sura and Viswasrawa of great glory; Anuha, Yuvanaswu, Kakutstha, Vikrami, and Raghu; Vijava, Virihorta, Anga, Bhava, Sweta, and Vripadguru; Usinara, Sata-ratha, Kanka, Duliduha, and Druma; Dambhodbhava, Para, Vena, Sagara, Sankriti, and Nimi; Ajeya, Parasu, Pundra, Sambhu, and holy Deva- Vridha; Devahuya, Supratika, and Vrihad-ratha; Mahatsaha, Vinitatma, Sukratu, and Nala, the king of the Nishadas; Satyavrata, Santabhaya, Sumitra, and the chief Subala; Janujangha, Anaranya, Arka, Priyabhritya, Chuchi-vrata, Balabandhu, Nirmardda, Ketusringa, and Brhidbala; Dhrishtaketu, Brihatketu, Driptaketu, and Niramaya; Abikshit, Chapala, Dhurta, Kritbandhu, and Dridhe-shudhi; Mahapurana-sambhavya, Pratyanga, Paraha and Sruti.
For after this I need say no more for to unfold the motion of the heart, but that when these concavities are not full of bloud, necessarily there runs some from the vena cava into the right, and from the veinous artery into the left; for that these two vessels are always full of it, and that their openings which are towards the heart cannot then be shut: But that assoon as there is thus but two drops of bloud entred, one in either of these concavities, these drops, which cannot but be very big, by reason that their openings whereby they enter are very large, and the vessels whence they come very full of bloud, are rarified and dilated because of the heat which they find therein.
We will now sum up, and put together in their order, the different things we have learned about the circulation of the blood through the body. R.A., right auricle; L.A., left auricle; R.V., right ventricle; L.V., left ventricle; A, aorta; P.A., pulmonary artery; P.V., pulmonary veins; V.C.s., Vena cava superior; V.C.i., Vena cava inferior.
It therefore appears that, although one ventricle of the heart, the left to wit, would suffice for the distribution of the blood over the body, and its eduction from the vena cava, as indeed is done in those creatures that have no lungs, nature, nevertheless, when she ordained that the same blood should also percolate the lungs, saw herself obliged to add the right ventricle, the pulse of which should force the blood from the vena cava through the lungs into the cavity of the left ventricle.
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