424 



ELEMENTARY ANATOMY. 



[LESS. 



Another vein, called the umbilical, comes from the anterior 

 abdominal wall and from other parts, and joins the omphalo- 



FIG. 367. DIAGRAM REPRESENTING THE EARLY CONDITION OF THE 



ClRCULATIOM IN MAN. 



The course of the blood is indicated by arrows. 



{After Quain and Sharpey. ) 



s,s, the aortic arch and descending aorta ; i,i, hypogastric or umbilical arteries, 

 afterwards forming the trunk of the internal iliacs, arising from the common 

 iliacs ; a, the same arteries ascending to the navel ; u, umbilical vein ; ci, 

 ductus venosus going direct to the inferior vena cava ; ^, vena portae, returning 

 blood from digestive organs ; /z, hepatic veins ; c, vena cava inferior ; c', vena 

 cava superior; r, right auricle; v' , right ventricle; /, left auricle; v, left 

 ventricle ; p, pulmonary artery ; o, ductus arteriosus. 



