140 



THE STUDY OF SIX AND TEN MILLIMETER PIG EMBRYOS 



septum transverswn. The liver, with its fine network of trabecule 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 qang, 



Descending Oorto. 

 Afesonephros 



J pi na I cord 



Notochord 



RLung bud 



Esophagi 



Leaser peri 

 tone.a.1 sac 



Inf. vena cava _v 



Sympathetic gang. 

 Postcard, vein 



Mesonephri'c 

 tubule 



Peritoneal 

 cavity 



D.lobe of 

 Liver 



« ,-,- ,-mj*jJ~—. 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 

 Notochord 

 Dorsal aorta 



Plica venae 

 cawae 



Inf. vena cava 

 Lesser amentum 



Spinal gang. 



Base of, , 

 upper limb 



Glomerulus of 

 mesonephros 



Greater omentum 

 Stomach 

 0. lobe of liver 

 Ductus venosus 



V.lobe of Liver 



Ventral attachment- 

 of liver 



Xjct. '■■>_ '_'"• (*>i. —&« . 



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



