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WILLIAM A. LOCY AND OLOF LARSELL 



Pul.Ai 



Abd.Sc. 



Fig. 59 Transparency of the lung of an embryo of 5 days 9 hours incubation 

 to illustrate capillary loops surrounding the meso])ronchus and connecting the 

 pulmonary artery and the pulmonary vein. 



Fig. 60 Lungs of an embryo incubated 5 days 20 hours to show the capillary 

 network connecting pulmonary artery and vein. The four entobronchi have 

 been established. The bronchus is occluded in its anterior portion. (A) dor- 

 sal aspect, (B) lateral aspect. 



