Il6 THE STUDY OF SIX AND TEN MILLIMETER PIG EMBRYOS 



space between the liver and plica to the right, and the stomach and its omenta to the left, is 

 a caudal continuation of the lesser peritoneal sac. The dorsal wall of the stomach is rotated 

 to the left, its ventral wall to the right. The liver shov/s a pair of dorsal lobes and contains 



Spinal ganq. 



Notochord 



Dorsal aorta. 



Peritoneal cavity 

 Lesser sac 



Common hepatic 

 Vein (Ryitel line) 



17. ventral lobe 

 liver 



n. ventricle 



Spinal Cord 

 Spinal nerve 



Post, card .Vein 



Upper limb bud 

 Otomach 



/.ventral lobe 

 liver 



Lventrlcle 



Fig. 106. — Transverse section through the stomach of a 6 mm. pig embryo. X 26.5. 



Spinal cord 



Nolochord 

 Posf. card, vein 



Dorsal aorta 

 Inf. vena cava. 



' ! - f^&r^s 



WWYW0-, ^mmmff} 



Portal vein W ™ MmmM 



ff. umbilical vein 

 Hepatic diverticulum 



Upper limb bud 



Dorsal mesogastnum 

 Dorsal lobe liver 



L. Vitelline Vein 



I. Umbilical Vein 



Peritoneal cavity 

 Fig. 107. — Transverse section through the hepatic diverticulum of a 6 mm. pig embryo. X 26.5. 



large blood spaces and networks of sinusoids lined with endothelium. Ventral to the liver, 

 the tips of the ventricles are seen. 



Transverse Section through the Hepatic Diverticulum (Fig. 107).— The upper 

 limb buds are prominent in this section. The mesonephric folds show the tubules and glomeruli 



