— e 
199^ OF THE HEART, VESSELS: ^ 
end párticulary , why the gills ór the langs:cannat be nom 
rifhed, though the whole inafs paffes through chem, 5.509 
: Se. IV. | | 
i: : E ces 2 : ar $ VE 
^45. From the extremities. of thefe feveral arteries the 
blood is returned. to the heart by veins which in general re» — 
femble our vena portarum (z)and venaecavae(0). —- 
e e 
X 
46, When we examine thefe veins more accurately, we 
find twe venae cave, a right end left one; equal in fize and 
fimilar in fituation, communicating freely by tlieir trunks im 
the abdomen, «and in other places, as in the heart, by their 
branches. — In both, the branches are much larger in their 
courfe than at their terminations and they, befides, form con- 
fiderable recep£atíes of blood. | For inflance, each of the ab- 
'dominal cave has double the diameter of thé cavz conjoined 
attheheads and, under the place at which the two cavx comn- 
municate, there is a large receptacle of blood covered by the : 
- ovarium in the female, and by the teftes in the male(p).- In 
lke manner, the hepatic veins between the liver and dia- 
phragm form finufes, the diameter of which is ten times great» 
er than that of their openings into the cavz (4). i 
|. 27. Upon the whole the join in the following nianner, 
'T'he veins from the tail, joining with the iliac: vein, form the 
bottom cf the two vczae tavae Tab, I.:24. — "Ther the veins 
from the organs of urine and generation are added, 24, 2$, 
At 26. the two abdominal cavae, Which arecontiguous, com* 
mmunicate freely with each other, At 27, above the diaphrag- 
me and behind carülases, which.refemble our clavicles; the 
abdominal cavae join with the veins, which refemble the branch- 
es of our fuperior cava, — At 28, 29, 30, veins from th 
mufcles 
n t tar Maa 

(1) Tab. HII, XX, Y, ZZ, aa, bb, c, d; e, f. 
(0) "Tab. Il, : 
(p) Tab. IX. 5. 
(2) Tab. II. 31. P 
