THE DEVELOPMENT OF THE VASCULAR SYSTEM 



239 



Innominate artery 



Branches of right 

 pulmonary artery " 



Arch of aorta 

 Pulmonary artery 



Right auricular appendage- - -j- --- 7 



Left carotid artery 

 Left subclavian artery 



Ductus arteriosus 



Branches of left 

 pulmonary artery 



Left auricular appendage 



--- Left ventricle 



Right ventricle i-_--\- - - 



Descending aorta 



FIG. 216. Ventral view of heart of foetus at term. Kollmann's Atlas. 



Sup. vena cava- 



Inf . vena cava 



Right atrium- 



Right ventricle .- . _ 



Inf. vena cava 



Left ventricle 



FIG. 217. Dorsal half of foetal heart. Bumm, Kollmann's Atlas. 



