682 



THE BLOOD-VASCULAR SYSTEM 



and the upper part of the fascia of the urogenital diaphragm (fig. 542). Here it bifurcates, 

 each branch passing backward and downward to the pudendal plexus of veins. At times the 



dorsal 

 a sing' 



vein begins as two branches, which run between the dorsal arteries and only unite to form 

 ^le trunk about 3.7 cm. (li in.) from the symphysis. After dividing into a right and a 

 left branch within the pelvis, each vessel generally communicates with the obturator vein by a 

 branch passing over the back of the pubis to the obturator foramen. 



Fig. 537. — The Subcutaneous Arteries and Veins of the Anterior Body Wall. 



(After Toldt, "Atlas of Human Anatomy, 



Anterior jugular vein i 



Edge of superficial cervical fascia 

 Superficial cervical artery and vein 

 Cephalic vein opening into the deep 

 vein of neck (variation) 



Rebman, London and New York.) 



. , Subcutaneous venous net of the neck 



, Arch of the jugular vein 

 Pectoral venous rete 



Mammillary venous plexus 



Connections with thet&'- 

 internal mammary 

 veins and with the 

 perforating branches 

 of the internal mam- 

 mary arteries 



Connections with the su- 

 perior epigastric veins 

 and chief branches of 

 the superior epigastric 

 arteries 



Branches of the para- 

 umbilical veins 



Venous rete of the 

 umbilicus 

 Connections with the infer- 

 ior epigastric veins and 

 the chief branches of the 

 inferior epigastric ar- 

 teries 



Superficial epigastric 

 artery and veins 



Superficial circumflex 

 iliac artery and vein 



Great saphenous vein- 

 Femoral vein — 



Subcutaneous dor- 

 sal vein of thc- 

 penis 



« Lateral thoracic 

 artery and vein 



Costo-axillary veins 



-Thoraco-epigastric vein 



Abdominal venous rete 



/5 



•^vi^ • 'i -qnn _^ Inguinal lymph-nodes 



\0^ Superficial, subingui- 

 \ \i* =" lal lymph-nodes 



External pudendal 

 arteries and veins 



^^ 



The pudendal plexus [plexus pudendalis] surrounds the prostate and the neck and fundus 

 of the biadflor. It receives in front the right and left divisions of the dorsal veins of the penis, 

 and commimicates with the posterior scrotal veins [vv. scrotales posteriorcs] and with the ha^mor- 

 rhoidal plexus. The prostatic veins and the vesical plexus open into it, and it also communi- 

 cates with the internal pudendal vein. The veins forming the plexus are of large size, especially 

 in old men, in whom they often become varicose, and contain phleboliths, or vein-stones 



