140 



THE STUDY OF SIX AND TEN MILLIMETER PIG EMBRYOS 



septum transfer sum. The liver, with its fine network of trabeculae and sinusoids, is large and 

 nearly fills the peritoneal or abdominal cavity. The liver cords are composed of liver cells 

 surrounded by the endothelium of the sinusoids. Red blood-cells are developed in the liver 



Spinal qany. 



Descending Gorta. 

 Mesonephro s 



Opina I cord 



RLuny bud 



Esophagus 



Lesser peri- 

 toneal sac ~ 



Inf. vena cava 



Notochord 



'Sympathetic ganq. 

 Post card vein 



Mesonephric 

 tubule 



Peritoneal 

 cavity 



D.tobe of 

 Li vet- 



Sinusoids of 

 Liver 



Ductus venosus/ 



FIG. 132. Dorsal half of a transverse section through the lung buds cranial to the stomach in a 

 10 mm. pig embryo. X 22.5. Post. card, vein, posterior cardinal vein. 



Spinal cord 



Notocriord 



Dorsalaorta 



Plica venae 

 cai/ae 



Inf. vena cava 



Lesser amentum 



nal ^any- 



of. , 

 upper limb 



G/omeru/Ks of 

 tneso nephros 



Greater omenturn 



Stomach 



D. lobe of liver 



Ductus venosus 



l/.lobe of Liver 



Ventral attachment 

 of liver 



FIG. 133. Transverse section through the stomach and liver of a 10 mm. pig embryo. X 22.5. 



