AMPHIBIA 



277 



esophagus into the stomach where it is acted upon by the gastric 

 juice. 



The alimentary canal consists of: {a) the esophagus, a short, 

 wide tube leading from the buccal cavity to the mouth; ih) the 

 stomachy a wide tubular sac, one and one-half inches long, narrowed 

 behind and separated from the duodenum by the pyloric constric- 

 tion, a valve; {c) the small irjtestine, with the duodenum., one inch 



/r'/gh/ auricl^ 



ffight ovic/act'~^<^_ \ 



/?/'ghf /arxj - 



Sysf'ema'fic trunks' 

 Coel. mes. ortery 

 Pt. cv. vein - 



/?, kidney 

 f^. oviduct 



Ureter 

 Dorsal oorfa—' 

 flight oviduct"-' 



Reef urn '' 



Ventricle 



J Left auricle 



Left oviduct 



"^ /^ostcovaj vein 

 - Liver 

 —Ouilei^ 

 —Lett Jung 



--Left oviduct 



'g^^'-Left ovary 



zc'Le'tt oviduct 

 "Left oviduct 



Urinary bladder 



/Abdominal vein 



Fig. 149. Organs of a female frog. (From Newman, after Parker and Haswell. 



Courtesy of The Macmillan Co.) 



long, bent back parallel with the stomach, and the coiled ileum^ a 

 slender tube about four and one-half inches long; {d) the large 

 intestine or rectum^ a straight tube about one and one-fourth inches 

 long and three-fourths of an inch wide; (<?) the cloaca^ continuous 

 with the large intestine. It receives the large intestine^ bladder^ 

 ureters and genital ducts. 



Accessory Organs. — The liver is a reddish brown organ with two 

 lobes connected by a narrow bridge. The left lobe is large and 

 subdivided into two. The gall bladder is a small spherical greenish 



