Fact 1: Chordates have a complete digestive system and a closed circulatory system.

Fact 2: Because reptiles are vertebrates, they are chordates.

Given the two facts above, answer the question "what have complete digestive systems?" with the following options: 
- a fish
 - saliva
 - mammals
 - insects
 - protist
 - barnacles
 - reptiles
 - rabbit


 

       reptiles  