130 STUDY OF CHORDATP] BRANCH CHARACTERISTICS 



(c) Position on body? 



(d) Number? 



(e) Use? 



4. Respiration, by means of 



5. Circulation. 



(1) Single or double? 



(2) Of how many chambers does the heart consist? Name 



them. 



(3) Is the animal poikilothermal or homoiothermal? 



6. Digestion. What digestive organs found in this animal 

 are peculiar to its class? 



7. This animal belongs to Class because it has 



the following characteristics of that class. (Student name 

 them.) 



8. Consult descriptive zoologies for Classes. 



