^ 



66 



AORTAL ARTERIES 



Sect.V. 5; 



of vegetables is performed like that of animals by the irritability of 

 their veflels to the fllmulus of the fluids^ which they abforb and pro* 

 trude ; that is, that the extremities of the branching veins of the 



* 



leaves forcibly abforb the vegetable. blood from the extremities of their 



which correfpond with the pulmonary arteries of 



nd th 



It 



thus pufhed 



the foot-ftalk of the leaf, wh 



s 



th 



nd branching out again take the office of an artery^ 



on. The blood in 



like the aorta in fifh, without perceptible pulfation. 



this artery is puflied, forwards by that behind it, the motion of 



was given'bythe power of abforptlon in the pulmonary vein, ti 



1 



the extremities of thefe aortal branches, and is there again 



forcibly abforbed by th 

 again, pufhed forwards 



e 



rminatlons of the correfpondent veins, and 

 the caudex gemmae, and to the foot-ftalk 



of 



leaf 



kc the blood in the vena cava of animals 



A part of this blood is at the fame time forcibly fele£led and ab- 

 forbed by the various glands for the purpofes of the necelfary fecre 

 tions, excretions, or nutrition ;., and the fap-juice or chyle and ih^ 

 water, which is acquired by the abforbent velTels, that correfpond to 

 the la6leal and lymphatic veflels of animals, is carried, as well as ths 

 remainder of the blood,, to the footr-ftalk of the leaf. Here thefe ab- 



forbent veflels are believed to pufli their contents into the veins cor 

 refpondent to the vena cava of animals, and which; now uniting with 

 out the intervention of a heart, aflame the name and office of the pul 

 monary arteries ; and branching out upon the leaf expofe the return 

 ing blood and new fap-juice to- the influence of the air. And finally 

 all this is accompliihed by the power of abforptlon, as in the aortal ai 

 teries, and vena portar^um^ of fifli, which is excited into a£lIon by th 

 irritability of the mouths of thefe vefljbls to the fl:imulus of the fluids 

 which they abforb, 



2d. A circulation of vegetable juices, in every refpe£l: fimilar to tha 

 in the common leaves above defcribed, exifls in the bractes or floral 



leaves,, except that the leaves of the leaf- bud prepare their juices fo 



the 



1 



