All of the following are organs of the digestive system except the___________.
Read the following statements about the 'digestive system' and identify the incorrect one(s) :
I.The human digestive system includes the alimentary canal and digestive glands.
II.Amoeba has a simple digestive system.
III.As the functions in an organism increase, the complexity of the digestive system decreases.
IV. The digestive system is the same in all organisms
The organs of the conducting zone of the respiratory system include all the following EXCEPT: