64 



AORTAL ARTERIES 



Sect. V. 3. 



f the heart of a horfe may not exceed thirty fquare inches, its whole 



power does not overcome the refinance of more th 



pound 



Hence it becomes intelho;ible, how the circulation of the blood 



th 



portarum of the liver is performed without any apparent 

 or coatradlion of its fides like an artery, which fome have 



indeed fuppofed it to pofiefs, but fimply by th 



fore 



f abforp 



exerted by the mouths of the veins, which fupply it with blood 



Secondly, how the circulation of the blood in the bodies of fifh 



cept in their gills, is carried on through their fyflem without thi 



And thirdly, how the blood in the vena cava of 

 s well as the fluids imbibed by the la£leals and 

 carried forwards to the heart by the power alone of 

 their abforbent mouths, which drink up their blood from the capil- 

 laries, or their other fluids from the furfaces or cavities of the body. 



tion of the heart, 

 the human body 

 lymphatics, are 



And laftly, how the whole cii 

 very minute veffels without val 



getables is performed 



and without a h 



folely by 



the power of abforption, circumftances which have long perplexed 

 the phyfiology both of the animal and vegetable kingdoms. 



Another circumftance attending the circulation of the juices in ve- 

 cretablcs, as well as the circulation of the blood in animal bodies, has 

 not been fufficiently attended to ; and that is, that the refinance to the 

 paffage of thefe fluids from the terminations of the arteries, in wh 



rmed cap 



to the beginnings of the veins, and through 



the crlands of various kinds, is much lefs than is generally imagined, 

 as we fee with what great force the mouths of both the vegetable 

 and animal abforbents imbibe their fluids ; and that the beginnings of 

 the veins, and the mouths of the lafteals and lymphatics, and proba- 

 bly thofe belonging to every kind of gland, poffefs this great power of 



bforp 



And th 



this account, when wounds are made in 



the fummer month 



hen the umb 



fap-veflels of the 



root have 



fed to ad, fuch wounds powerfully abforb any fluid 



whether falutary or poifonous, which is applied to them, which does 



not 



