210 MAMMALIA (tHE RABBIT) 



. (4) The Veins. (See Physiology.) Identify the flabby 

 veins and trace them from their origin in the organs 

 from which they carry the blood to the ascending 

 and descending vense cavse, and to their junction 

 with the heart. 

 (5) Trace the blood from the left ventricle to all parts of 

 the body, naming the principal branches of the aorta, 

 and the principal veins back through the lungs to the 

 starting point, the left ventricle. See some good 

 figure in physiology for the names of arteries and 

 veins. 



5. The Digestive System. 



(1) The Mouth. 



(a) Shape? 



(b) Size, large or small? 



(c) Contents? 



(d) Use? 



(2) The Pharynx. 



(a) Shape? 



(b) Size? 



The pharynx leads into a dilatable, muscular tube, the 

 esophagus. 



(3) The Esophagus. Thrust a probe down the rabbit's 



throat. Cut along the neck and follow the esopha- 

 gus. Note the windpipe or trachea, and its position 

 as related to the esophagus, but do not injure it. 



(a) Shape? 



(b) Size, length, and diameter? 



(c) Opens into what? 



(d) Use? 



(4) The Stomach. 



(a) Shape? 



(b) Size? Which end is the larger? 



(c) How many openings? 



(d) Use? 



(5) The Liver is a large dark-colored organ. 



(a) Shape? 



(b) Size? 



(c) Number of lobes? 



