FIG. 4. Dissection of a young Female Frog. The gullet (gu) and rectum ^rc/) 

 have been cut through, and the enteric canal removed between these two points. 

 The liver is removed, with the exception of a small portion (Ir) surrounding the 

 postcaval vein (pt. cv). The ventricle of the heart (v) is turned forwards, and 



