1961. The unclosed vascular system is not yet self-substantial, because it is a cæcal eversion of the intestine or inversion of the skin, being itself only a ramified intestine and skin. Every system, however, attains its perfection, by being rendered independent of its origin. Thus the leaf is the spiral vessel that has become free, the root the cellular tissue in a like condition, the blossom the liberated vegetable trunk. The vascular system will therefore aspire also to the achievement of its blossom. 1962. If the decomposition that is effected by an inferior amount of polarization, does not happen rapidly enough, for what has flowed thither, to disappear, during its afflux, by evaporation or precipitation; the rest of the mucus which has obtained the air-polarity, is now repelled by the respiratory vessels, because both have become synonymous. 1963. The oxydized superfluous mucus is at once, however, attracted by the intestine, because they are not synonymous. There consequently originates a vessel in the mass of mucus or parenchyma, that has been secreted between the intestine and skin, which begins in the respiratory membrane and terminates in the intestine. 1964. This vessel will commence at the end of the absorbents, or at a point, where it devolves upon the respiratory vessels, to take up their contents, namely the oxygen, together with the nutritive substance, and convey them to the intestine. The mucus, which previously stagnated and moved but slowly from one spot to another, is now again carried back by another vessel without interruption to the intestine. 1965. The vessel which conveys oxydized mucus from the respiratory to the intestinal system, is called _artery_. 1966. On the intestine, however, this polar mucus is again reduced to ordinary mucus. It has now become synonymous with the intestine, is repelled from it and attracted by the branchial membrane. 1967. One and the same fluid or sap is consequently brought back from the branchia to the intestine, and from thence again to the branchia. This last vessel is called _vein_. a. _Arteries._ 1968. The artery is, according to its signification, an air-vessel, which is prolonged or elongated as far as the intestine. Essentially, the artery conveys nothing but air, though this is effected by means of a medium or vehicle, which is the undecomposed mucus (blood). It is an air-tube, that has been self-substantially dismembered from the skin, in order to become a special independent air-tube, or such as is commensurate with animal nature. 1969. In the artery the external integument has been repeated in the nutritive system, and hence the galvanism has become of a continuous character. 1970. The artery must therefore be the highest vessel, the most total of all terrestrial processes. For it is the air-duct united with the intestinal vessel. It contains mucus, which carries the properties of both poles of the body in itself; there is oxydized mucus.