XIII 



PHYLUM CHORDATA 



281 



The blood from the front part of the liind-leg is brouglit l)ack 

 by n,frmornlvein (fm.) which, on reaching the cccloine, divides into 

 two branches, a dorsal and a ventral. The dorsal branch is the 

 renal ])ortal vein (rn. pt.) : it receives the hcviUc vein (sc.) from the 



^m 



Fifi. 933.— Rana temporaria. The venous system with the heart, lungs, liver, kidneys, and 

 right testis, from the dorsal aspect, alxl. abdominal vein ; /«•. brachial vein ; <■'/. cardiac 

 vein ; lU liiili. dui'so-lumbar vein ; du. duodenal vein ; ext. ju. external jtigular vein ; fm. 

 femoral vein ; ;«. gastric vein ; /<p. hepatic vein ; /i^). pt. hepatic j)ortal vein ; int. intestinal 

 veins ; oii. jit. "internal jugular vein ; k-d. kidney ; 1. iiu. left auricle ; inr/. lung ; Ivr. liver ; 

 m.s. <:i(. museulo-cutaneous vein ; pr. cr. preeaval vein ; pt. ci: postcaval vein ; pji/. pulmonary 

 vein ; pv. pelvic vein ; r. an. right auricle ; rn. renal veins ; rn. 'pt- renal portal vein ; 

 sc. sciatic vein ; spl. splenic vein ; spm. spermatic vein ; s. v. sinus vcnosus ; ts. testis ; 

 ves. vesical veins. 



back of the leg and passes to the kidney, in which it breaks up into 

 capillaries. Tlie ventral branch is the pelvic vein {iro.) : it unites 

 witli its fellow of the opposite side to form the abdominal vein 



