20O 



ANIMAL BIOLOGY. 



[Part I. 



liver. It is formed by the union of two factors ; the gastric (g.) 

 from the stomach, and the lieno-intestinal (I. i.) from the intes- 

 tines. Blood from the hinder part of the body also reaches the 



s cl 



FIG. 60. HEART AND GREAT VESSELS OF FROG. 



an. ab. Anterior abdominal, an. Auricle, br. Bracliial vein. c. Cceliac artery, 

 c. m. Coeliaco-mesenteric artery, ca. Carotid artery, ca. gl. Carotid gland. CM-. 

 Cutaneous artery, d. ao. Dorsal aorta, ex. j u. External jugular, g. Gastric vein. 

 he. Hepatic vein. in. Innominate vein, in.ju. Internal jugular vein. U. Lingual 

 artery. I. i. Lieno-intestinal vein. lg. Lung. m. Mescnteric artery, m. c. 

 Great cutaneous vein. p. Pulmonary artery, p. cu. Pulmo-cutaneous artery. 

 por. Portal vein. pr. c. Precaval vein. pt. c. Postcaval vein. s. cl. a. Subclavian 

 artery, s. cl. v. Subclavian vein. s. sc. Subscapular vein. sy. ao. Systemic aorta. 

 tr. a. Truncus arteriosus. ve. Ventricle, ver. Vertebral artery. 



liver by the anterior abdominal vein (an. ab.). A connecting- 

 branch unites the anterior abdominal and the portal, and a small 

 factor comes from the truncus arteriosus. From the liver the 

 blood passes into the postcaval vein (pt. c.) by the hepatic veins (he.). 

 The postcaval delivers to the sinus venosus blood from the 

 large kidneys ; the blood from the head and fore-limbs reaches 

 the sinus venosus by two precavals (pr. c.), one on either side. 



