Fig. 22. 1- oesophagus; 2- craw; 3- tendinous part of the 



stomach; 4- muscular part of the stomach; 5- duodenum; 



6- pancreas; 7- small intestine; 8- caecum; 9- rectum; 



10- cloaca; 11- anal opening; 12- large intestine; 13- vessels 



of the yolk; 14- yolk duct; 15- its inf undibulum ; 16- yellow 



vessels; 



Fig. 23. 12th day: 1- heart with pericardium; 2- liver; 

 3- tendinous part of the stomach; 4- muscular part of the 

 stomach; 5- duodenum; 6- pancreas; 7- caecum; 8- large 

 intestine; 9- small intestine; 10- rectum; 11- cloaca; 



12- anal opening; 13- yolk duct; 14- yolk vessels; 15- yellow 

 vessels; 



Fig. 24. 16th day: 1- heart with pericardium; 2- liver; 



3- craw; 4- tendinous part of the stomach; 5- muscular part 



of the stomach; 6- duodenum; 7- pancreas; 8- small intestine; 



9- large intestine; 10- caecum; 11- rectum; 12- cloaca; 



13- anal opening; 14- yolk duct; 15- yolk vessels; 16- yellow 

 vessels; 17- chorion vessels; 



Fig. 25. the twelfth hour of the 18th day: 1- intestines; 



2- yolk vessels; 3- yolk duct; 4- yellow vessels; 



Fig. 26. 18th day: 1- heart; 2- liver; 3- tendinous part 

 of the stomach; 4- muscular part of the stomach; 5- chorion 

 vessels; 6- duodenum; 7- pancreas; 8- small intestine; 9- yolk 

 vessels; 10- yolk-intestinal duct; 11- yolk duct; 12- yolk 

 membrane; 13- cut amnion; 14- cut navel; 



Fig. 27. 28 hours after hatching: 1- intestines; 2- yolk- 

 intestinal membranes; 3- yolk vessels; 4- yellow vessels; 



Fig. 28. 1- intestines; 2- yolk-intestinal duct; 3- yolk 

 vessels; 4- yellow vessels; 



Fig. 29. 4th day after hatching; the same legends; 



Fig. 30. 4th day after hatching: 1- craw; 2- oesophagus; 



3- trachea; 4- neck; 5- lever; 6- stomach; 7- muscular part 

 of the stomach; 8- tendinous part of the stomach; 9- duodenum; 



10- pancreas; 11- small intestine; 12- remnants of the navel; 



220 



