{ ii8^ ) 
As the Arteries 2iXt known to expert the Blqod^\ fo the 
Veins carry it back ag^in to the Ueak ^ but buvjrlg ialready 
defcribed t^^^^ Exiremitks, we conle next ro rbe large 
Trunks of the Veins if, and here, as in the Arteries^ we find* 
the coaimon pradicc ot Nut^re^ in dif^ofing the Branches 
ot VchfJi to difcliarge the Rcfl ient Blood into the next ad» 
jacenr Trlfe^ and fo.on to the rleart. As the Arteries zi^ 
ford abundincb.of In^^ of Chet{{t given to the Veloci- 
ty- of ^heSurrent of the S/<W throi)g'i fcveral parts, fo 
the Veins fupply us with aS "riiany Artifices to allill: its regu- 
lar return to the Hearty as well as faVour ihok Co^trwar/ces 
ill the Arteries* 
Tlie Trunks of the Carotid, Vertebral and S^tenick Arte^ 
nes are not only varioully Contorted, but are alfo here and 
there Diluted ^ fo the Veins that cof refpond to thofe Arte- 
ries are alfo varioully Dilated. The beginnings of the In- 
ternal jiignlars have a Bulbous cavity f Fig. 7. H, H,) which 
are Divaticnli to the Refluent ^lood in the Sinus s of 
the Dura Mater, left itftiduld defcend too faft into the Ju- 
gulars. The like has been alfo taken notice of by Dr Low^r 
in the Vrtebrul Sin/0's. .Tht Sp I enick, Vein has divers Ce/7j 
©pening into it near its Extremities in Human Bodies 5 but 
in Qiiadrupedis the open into the Trunks of thdr 
Sfleenic'kVQins. 
TliQ Spermatic^ Veins do more than equal the Length of 
the Arteries th^ TeJies in Men their various Divifions 
and feveral Inofctdations and their Valves,are admirably con- 
triv*d to fufpend the Weight of the Blood, in order to diC- 
charge it into the larger Trunks of the Veins and. were it 
not that the Refluent Blood from the Tejies is a, Pondus to 
the Influent Blood from the Arteries, and ftill leffens 'its^ 
current in the Tejhs 5 thefe Spermatick Veins, like thofe of 
other partSj ^ might have difcharged their Bipod into the- 
next adjacent TrnnL . ^'''^' 
Who can avoid lurprize at the Art of Nature, in contri- 
ving the Veins that bring part of the Refluent Blood from^ 
the lower parts of the Body ? when they cohfider the ne- ' 
ceffity 
