Part II. i7i the Creation. 355 



the Auricle, which otherwife encouiitring and 

 bearing upon that of the afcendcnt Trunk, would 

 very much hinder and retard the motion of it 

 upward towards the Heart ; and becaufe in an 

 ere6l Site and Figure of the Body there is a grea- 

 ter and more imminent danger of fuch an Acci- 

 dent, therefore the Vena Cava in Mankind hath 

 this Tubercle far greater and of more extent than 

 it is in Brutes ; fo that if you thruft your Finger 

 into either Trunk, you can hardly fihd Paffage or 

 Admittance into the other. 



But in Quadrupeds, as in Sheepy DogSy Horfe, 

 Kine^ in which the Courfe of the Blood from ei- 

 ther Extreme of the Body is more equal, and as 

 it were in a plainer Level ; and becaufe the Heart 

 by rcafon of its Bulk and Weight hanging down- 

 wards, both Trunks of the Vena Cava have fome 

 little Declivity towards it, there is no need of fo 

 great a Bar and Diverfion in them, yet are they 

 not altogether devoid of it. 



Moreover, left the Blood here in its Conflux 

 fhould make a kind of Flood and Whirlpool, 

 whilft the Auricle being contracted doth not give 

 it free Ingrefs, therefore in this place the Vena 

 Cava in great Animals, as well Man as Quadru- 

 peds, is round about mufculous, as well that it 

 may be reftrain'd and kept within its due Limits 

 of Extenfion, as that it may more vigoroufly and 

 ftrongly urge and impel the Blood into the Cavi- 

 ty of the Auricle. ^ 



A a 2 Befides, 



