39 



PLATE XX. 



THE 



continued. 



CIRCULATORY SYSTEM 

 FIG. 1. ARTERIES 



f Lingual artery (L. lingua, the tongue) to tongue. 

 CAROT'ID TRUNK OR AN- J Carotid gland. 



TERIOE AORTIC ARCH ] Carotid artery to head by way of ear (Gr. kara, the head ; mis, the 

 V ear). 



/ Vertebral artery to vertebral column. 



Sub-clavian artery (L. sub, under; clavicula, collar-bone) to forelimb. 

 (Esophageal artery to gullet. 



Cceliac artery ( Hepatic to liver. 

 (Gr. Tcoilia, the belly) \ Gastric to stomach. 

 ( Splenic to spleen. 

 ( Haemal to intestine (not named). 

 Dorsal aorta, giving off branches to various organs. 

 Common iliac arteries formed by the forking of the aorta in the 

 neighbourhood of the ilium, and giving off hypogastric branches 

 to the bladder and lower parts of the belly. 



Femoral and sciatic arteries, a continuation of the common iliac 

 down the thigh. 



AORTIC TRUNK OK 

 MIDDLE AOETIO 

 ARCH 



Mesenteric artery 



PULMO-CUTANEOUS 

 TRUNK OR POS- 

 TERIOR AORTIC 



AECH 



FIG. 2. VEINS 



SUPERIOR VENA CAVA, 

 FORMED BY 



INFERIOR VENA CAVA, 

 FORMED BY 



J Pul'monary artery to lung (L. pulmo, a lung). 



} Cutaneous artery to the skin of the back (L. cutis, the skin). 



C Innominate, formed by / * nternal **&*** 

 ( Sub-scapular. 



} Sub-clavian, formed by / Musculo-cutaneous. 

 ( Brachial. 



^ External jugular. 



f Eenal. 

 < Genital (not shown). 



(. Hepat'ic. 



COMMON ILIAC or EENAL AFFERENT VEIN formed by the dorsal ends of the pelvic vein, which is 



formed by the femoral and sciatic veins. Dorso-lumbar vein opens into common iliac. 

 ANTERIOR ABDOMINAL VEIN formed by the ventral ends of the pelvic vein. 



f Gastric. 



PORTAL VEIN or VENA PORT.E (L. the vein of the gate of the liver) formed by -| Lieno-intestinal (L. 



V lienis, the spleen). 

 COMMON PULMONARY VEIN formed by the veins of the right and left lungs. 



DIAGRAM I. THE HEART, with the principal vessels distributing and returning the blood 



f Sinus venosus (L. venous sinus) receiving superior and inferior 

 venae cavae. 



HEART -^ Eight auricle with sinus venosus opening into it. 



I Left auricle receiving common pulmonary vein. 



L Ventricle leading into truncus arteriosus (L. arterial trunk). 



