340 RENAL ARTERIES. LUMBAR ARTERIES. 



The spermatic arteries in the female descend into the pelvis and pass 

 between the two layers of the broad ligaments of the uterus, to be 

 distributed to the ovaries, Fallopian tubes, and round ligaments ; 

 along the latter they are continued to the inguinal canal and labium 

 at each side. 



They inosculate with the uterine arteries. 



The INFERIOR MESENTERIC ARTERY, smaller than the superior, 

 arises from the abdominal aorta, about two inches below the origin of 

 that vessel, and descends between the layers of the left mesocolon, to 

 the left iliac fossa, where it divides into three branches: 



Colica sinistra, 



Sigmoideae, 



Superior hsemorrhoidal. 



The Colica sinistra is distributed to the descending colon, and ascends 

 to inosculate with the colica media. This is the largest arterial in- 

 osulation in the body. 



The Sigmoidece are several large branches which are distributed to 

 the sigmoid flexure of the descending colon. They form arches, and 

 inosculate above with the colica sinistra, and below with the superior 

 haemorrhoidal artery. 



The Superior hamorrhoidal artery is the continuation of the inferior 

 mesenteric. It crosses the ureter and common iliac artery of the left 

 side, and descends between the two layers of the meso-rectum as far 

 as the middle of the rectum to which it is distributed, anastomosing 

 with the middle and external haemorrhoidal arteries. 



The SUPRA-RENAL are two small vessels which arise from the 

 aorta immediately above the renal arteries, and are distributed to the 

 supra-renal capsules. They are sometimes branches of the phrenic or 

 of the renal arteries. 



The RENAL ARTERIES (emulgent) are two large trunks given off from 

 the sides of the aorta immediately below the superior mesenteric artery ; 

 the right is longer than the left on account of the position of the aorta, 

 and passes behind the vena cava to the kidney of that side. The left 

 is somewhat higher than the right. They divide into several large 

 branches previously to entering the kidney, and ramify very minutely 

 in its vascular portion. The renal arteries supply several small branches 

 to the supra-renal capsules. 



The LUMBAR ARTERIES correspond with the intercostals in the 

 chest ; they are four or five in number on each side, and curve around 

 the bodies of the lumbar vertebrae beneath the psoas muscles, and di- 

 vide into two branches ; one of which passes backwards between the 

 transverse processes, and is distributed to the vertebrae and spinal cord 



