140 AMPHIBIA (the frog) 



the flaps of the body walls, exposing the viscera. Insert a blow- 

 pipe in the glottis and inflate the lungs, then tie a string tightly 

 around the trachea to keep them inflated. Dissect under 

 water, 



(1) The Mouth. 



(a) The Teeth. Open the mouth wide. Ascertain — 



(1) The number of the teeth. 



(2) Their arrangement. 



(3) Their location. 



(b) The Tongue. 



(1) Is it long or short? 



(2) Shape? 



(3) Where attached? Why? 



(4) Is the free end entire, slightly nicked, heart 



shaped, or deeply notched? 



(5) How and when is the food captured? 



(c) The Glottis. Find a longitudinal slit in the back 



of the floor of the mouth. Into what does it 

 open? 



(d) The Pharynx. The posterior portion of the mouth 



may be considered as the pharynx, which opens 

 into the esophagus, leading to the stomach. 

 Thrust a probe down the esophagus to the 

 stomach. 



(2) The Stomach. 



(a) Identify and describe it. 



(b) Shape? 



(c) Size? 



(d) Color? 



(e) Location? 



(3) The Liver is reddish brown and lies upon the stomach. 



(a) How many lobes? 



(b) Find the gall-bladder. 



(1) Shape? 



(2) Color? 



(3) Use? 



(4) The Pancreas is in the first fold of the intestine. 



(a) Shape? 



(b) Color? 



