Chordates have a complete digestive system and a closed circulatory system, and because reptiles are vertebrates, they are chordates. Given these facts, what have a complete digestive system and a closed circulatory system among the following options:
- viruses
 - reptiles
 - phytoplankton
 - mammals
 - bacteria
 - graptolites
 - humans
 - elephants


 

  reptiles       