162 REPTILIA (the turtle) 



(b) What is the position of the lungs with reference to the 



heart and stomach? 



(c) Note the position of the large liver and make a study 



of it in its place. 



(1) Color? 



(2) Location? 



(3) Number of lobes? 



(4) Use? 



(5) Identify and locate the gall-bladder? Use? 



(6) Trace the bile-ducts to the duodenum or anterior 



loop of the intestine. 

 2. The Circulatory System. 



(1) The Heart. 



(a) Size? 



(b) Shape? 



(c) Parts present? 



(d) Pericardium. Use? 



(e) Ventricle. The pointed posterior portion of the 



heart is the ventricle. 



(1) Shape? 



(2) Color? 



(3) Size? 



(4) Use? 



(f) The Auricles. At the anterior and dorsal end of the 



heart find the two auricles. 



(1) Are their walls thick or thin as compared with 



those of the ventricle? 



(2) Shape? 



(3) Size? 



(4) Color? 



(5) Use? 



(2) Arteries. 



(a) Trace the two aortse from the heart to their 



union. 



(b) Trace arteries to the stomach and to other principal 



organs. 



(3) The Veins. The flabby blood-vessels are veins. As 



you traced the arteries from the heart, now trace the 

 veins to the heart. 



