THE ARTERIES. 



27 



iii. A cardiac vein, from a network of vessels on 

 the truncus arteriosus. 



The hepatic portal vein is a wide vein which runs 

 in the mesentery and joins the anterior abdo- 

 minal vein at its point of division into right 

 and left branches ; giving off, before doing so, 

 a branch to the left lobe of the liver. It 

 carries to the liver the blood from the walls of 

 the alimentary canal, and is formed by the union 

 of the following veins. 



i. The gastric vein, from the stomach. 



Intestinal veins, from the whole length of the 

 intestine, both small and large. 



The splenic vein, from the spleen : this usually 

 joins one of the intestinal veins. 



11 



111 



C. The Arteries. 



fromth^rSfSr''*'" ^^"""^ ""^ ^^'^ '^'*''^'^^ '^'*'"' ^^ the male frog, 



nn»2>'f f T'"''!' • -'' "ostri^- ^' small intestine : c.«, carotid arterv : c.a, 

 carotid gland : r.jn coeliaco-mesenteric artery: c.n, cutaneous artery: 

 «vw? iptestine: d.a, dorsal aorta: /, femur: h, spleen: h.a, hepatic 

 nnntJf* '' "?^^* !""§= ^'^ l"ig"al artery: m, testis: o, kidney : o.a, 

 occijjito-vertehral artery ; p.a, pulmonary artery : r, pelvic girdle : 

 6, sternum : .'^ a, subclavian artery: .s.r, sciatic artery: f, tongue: 



«f;i. o''''"^'''^^-'''°^"f '■ o"' "rinogenital arteries : v, ventricle: 1, carotid 

 arch : 2, systemic arch : 3, pulmo-cutaneous arch. 



