14 
ANATOMY OF THE HORSE. 
the College directors to a too speedy reform: but ere long they 
will be compelled to acknowledge that they have been, for a long 
time, worshipping ignorance and empiricism in the garb of 
science, as Ixion embraced a cloud for a goddess ; and, wishing 
them any other punishment than his, 
• I beg leave to subscribe myself, 
Your obedient servant, 
W. F. Karkeek. 
ANATOMY OF THE HORSE. 
[Continued from vol. iv, page 665.] 
OF THE BLOODVESSELS. 
There are two orders of bloodvesssls —arteries and veins: 
the former conduct the blood from the heart to all parts of the 
body; the latter return it therefrom back to the heart. 
ARTERIES. 
These vessels, in all their manifold ramifications, spring origi¬ 
nally from tyvo main trunks—the 'pulmonary artery and the 
aorta: the former sends its branches to the lungs; the latter to 
all the other parts of the body. 
PULMONARY ARTERY. 
A vessel of larger calibre than the aorta. It takes its origin from 
the postero-superior part of the right ventricle of the heart, winds 
upwards to the root of the left lung, and there divides into right 
and left pulmonary arteries; which divisions immediately enter 
the substance of their correspondent lungs, and therein ramify to 
capillary minuteness, the branches regulating their course and 
division by the ramification of the bronchial tubes. 
AORTA. 
This trunk, together with its manifold branches, may be com¬ 
pared (viewing them altogether) to a short, but straggling and 
very branchy shrub or dwarf tree of luxuriant but extremely irre¬ 
gular growth; and their number and ramification may be pic¬ 
tured to the mind, by remembering that no organized part of the 
body is without few or many of them. 
