92 CUB ESE Re ENGLISH PHYSICIAN, -——m 
ideiet diy that the chyle might not run back again, or run farther into thearm: outof 
this /ubclavial they defcend by the afcending trunk of the vena cava into the rightven. = * 
tricle of the heart, that there, by the help of the heat and the natural faculty, they may 
be changed into blood. Their fubftance is the fame with that of a vein itfelf, which 
it refembles in all things, the milky juice only excepted ; having but a fingle mem- 
brane, though in the mefentery they receive from it another external coat. They 
grow continually one to another, of an unequal magnitude; being for the moft 
part fmall, left the thick and unprofitable parts of the chy/e fhould go into them; 
or left ‘they fhould make a diftribution. thereof too fuddenly : they are alfo infinite 
in number, difperfed through the: liver, mefentery, Pancreas, and bowels. They — 
are‘colder and moifter thafrelenon inary veins very thin;-exceeding fubtil, (where 
they enter into the body of the liver,) tender » fr mooth outwardly, rare, but rough by 
reafon of their fibres within them. The it action and ufe are, 1. To carry or “ont vey 
the chyle to the liver. and better concoé the chyle, to make’ 
more fit to receive the form of blood i in the liver ; for the chy/e is not ch: od at all 
till it comes into the liver, where i it grows tety ion and little. 3s me Z he 
ready way for the Taemas of etna) is t iver, 1 
are carried ithe ffomach, To thew, 
of the chylous i ie maaeate f f ancholy > of of t 
body for want of nourifhment, A yr at on of po i of the pat ei - 
filled with fchirrous {wellings :« of x, termitting aguies quartered i in the a ae bee 
The beft method of tracing the 
main trunks, or primary veil S, and end with their ramifications and capillary ex ext! 
mities, according to a eral divifions and fubdivifions. In this manner they 
are traced in the annexe: * 
body ; fig. 2, the veins. is ( radted from ae body; and { 
_ Of each of which the following i is an explanation. 
= a Vena cava, (fig. 1 and 2) 10, 10, Auxillary | veins 
2. Cava defcendens ~ “Th. a1. Cephalic veins 
+ ‘Cava afcendens- : | 12. 12. Bafilic veins” 
4 ‘Vena azygos 13. 13. Vena mediana 
te ‘Subelavian v veins — 14. 14. Diaphragmatic, hepa, and 1 - P 
6. 6. Jugular veins external _..... naL.or emulgent, veins 
7. 7. Jugular veins internal - 15. 15. Spermatic and iliac veins 
8. Theintercoftals : -. 16. 16. Hypogaftric, epigattric, and cru- 
9. 9. The mammary veins ; . ‘ral, veins. 
Fig. 
