THE FROG 



189 



\ 



FIG. 92. DIAGRAM OF THE CIRCULATION OF THE FROG 



The veins are represented in shaded lines and those entering the heart from 

 in front are shown only on one side. A, the general circulation shown from 

 below. 



a, abdominal vein; 

 ao, aorta; 



b, brachial; 



ba, bulbus arteriosus; 

 ca, coeliac axis; 

 co, carotid artery; 

 cu, cutaneous artery; 



hv, hepatic vein; 

 in, intestine; 

 jv, jugular vein; 

 I, lingual artery; 

 la, left auricle; 

 pro, pre vena cava; 

 ptc, post vena cava; 



B, The heart from below, showing the venus sinus cut open. 

 ao, aorta; puv, pulmonary vein; ptc, post vena cava: 



la, left auricle; pvc, pre vena cava; vs, venus sinus. 



ra, right auricle; 



pu, pulmonary artery; 

 pv, portal vein; 

 ra, right auricle; 

 rp, renal-portal vein; 

 sp, spermary; 

 v, ventricle. 



