984 



HUMAN ANATOMY. 



border of the psoas, the second in the angle between the vein and the artery, and 

 the third along the lower border of the vein, between it and the obturator nerve. 



The various nodes of the iliac set communicate with one another so that the 

 cfferents of one node are affere7its for the higher ones. In addition they receive 

 ajferents from the inguinal nodes as well as from the epigastric and circumflex iliac 

 nodes as already stated, and the group situated over the promontory of the sacrum 

 also receives afferents from both the hypogastric and sacral nodes. Furthermore, 

 afferents pass to the iliac nodes from the pelvic portions of the ureters, from the 

 bladder and prostate gland, from the lower portion of the uterus and the upper 

 portion of the vagina, from the glans penis and clitoris, from the adductor muscles 

 of the thigh through vessels accompanying the obturator artery, and, in the case of 

 the lateral series of nodes, from the psoas muscle and the adjacent subserous tissue. 

 The effcrents pass to the lower lateral lumbar nodes. 



The internal iliac or hypogastric nodes (lymphoglandulae hypogastricae) are 

 from nine to twelve in number on each side, and are situated on the lateral walls 

 of the pelvic cavity, along the course of the internal iliac vessel and its branches 



Fig. S25. 



Lower 



lumbar node 



Iliac node of 



promontory group 



Iliac nodes 





Superficial 



inguinal nodes 



Iliac nodes. [Cun^o and Marcille.*) 



(Fig. 825). They are connected together to form a plexus (plexus hypogastricus) , 

 and receive afferents from most of the regions to which the branches of the internal 

 iliac artery are distributed. Thus branches come to them from all the pelvic organs, 

 from the deeper portions of the perineum, including the penial portion of the urethra, 

 from the deep portions of the posterior and internal femoral and the gluteal regions. 

 Their efferents pass mainly to the iliac nodes situated on the promontory of the 

 sacrum," those which arise from the obturator node, situated upon the obturator artery 

 as it passes through the obturator foramen, passing, however, to nodes belonging to 

 the inner series of the group accompanying the external iliac vessels. 



The sacral nodes are situated on the ventral surface of the sacrum, partly 

 along the course of the middle sacral vessels, and partly internal to the second and 

 third anterior sacral foramina, along the course of the lateral sacral arteries (Fig. 829). 

 All the nodes are small and they are united together by lymphatic vessels to form a 

 sacral plexus (plexus sacralis medius). They receive afferents from the neighboring 

 muscles and from the sacrum, and their efferents pass to the iliac nodes situated 

 upon the promontory of the sacrum. 



The Lymphatic Vessels. 

 Under this heading will be considered the vessels of the various pelvic organs, 

 with the exception of those of the rectum, which have already been described 

 (page 979). In addition there will be included the vessels of the external genitalia, 



*Biill. et Mem. Soci^t^ anatom., 1901. 



