PIGEON. 119 



Reflect the two sides of the body-wall and 

 note the viscera now exposed to view : 



13. The heart in the pericardium. 



14. The liver. How many ]obes has it ? Which 



one is larger ? 



15. The duodenum, a U-shaped loop of the 



intestine. 



16. The pancreas, lying between the limbs of the 



loop. Look for its ducts. 



17. The gizzard. 



18. The loops of the small intestine. 



19. The epigastric vein, carrying blood from the 



omentum and passing up in the falciform 

 ligament to the anterior border of the 

 liver. 



(Note : 20 and 21 should be left until after 

 III.) 



20. Unravel the intestine and observe : 

 (Esophagus. Intestine. 



Crop. Rectum and rectal coeca. 



Proventriculus. Liver. 

 Gizzard . Pancreas. 



Spleen. 

 Diagram of the abdominal viscera, ducts, etc. ! 



21. Cut open the gizzard and observe its struc- 



ture. 

 III. The Circulatory System. 



The Heart. 

 Open the pericardium and observe the heart : 



