The Vascular System 211 
In the forearm the brachial may be called the 
radial, Fig. 60, A, ra; on the back of the manus the 
radial receives branches from the various digits 
and from a rather complex plexus of vessels in the 
carpal region. 
The external jugular, Fig. 60, ej, after separating 
from the subclavian, may be traced cephalad, close 
beneath the skin, to the base of the skull, where 
it is connected with the internal jugular by short 
branches, as has already been noted. It receives 
several small branches from the skin and muscles 
of the neck and shoulder regions. At the region 
of its anastomosis with the internal jugular 
it receives a large branch, the muscular, ms, from 
the massive muscle at the angle of the jaw and from 
the skin of that region. 
A short distance cephalad to the muscular the 
external jugular receives, on its mesial side, two 
or three branches from the trachea, larynx, and 
cesophagus, tr. Anterior to these vessels the 
external jugular is formed by the union of two 
chief veins, the Jingual, 1, from the ventro-lateral 
surface of the tongue, and the inferior dental, id, 
from the mesial surface of the lower jaw. The 
connection of the superior dental (extending along 
the bases of the maxillary teeth) with the jug- 
ular could not be determined with certainty, 
hence that vessel is not shown in the figure. The 
same is true of the small veins in the region of the 
cranium. 
