3 CHAPTER II. 



EXERCISES IN THE PREPARATION OF TISSUES. 



FIG. 4. Ventral dissection of a frog. 

 St Sternum reflected. B Bulbus arteriosus with 

 aorta?, to its right the left auricle, below is 

 the ventricle surrounded by P the pericardium. 

 La Larynx. Lg Lung. L right lobe of the liver, 

 P is on the left lobe. GB Gall bladder, ST 

 Stomach, Pa Pancreas with the common bile 

 and pancreatic duct opening below into SI the 

 small intestine. Between SI and C the cloaca 

 the right testis shows through the mesentery. 

 Above C is the spleen. V the bilobed bladder, 

 distended with air. Muscles of the thigh : GL Glutens, VI Vastus internus, 

 AL Adductor longus, S Sartorius, AB Adductor brevis, AM Adductor magnus, 

 RIM Rectum internus major, below it in the leg the gastrocnemius. 



