You are presented with the question "What kind of circulatory system does a reptile have?" and the following answer choices: 
- three
 - Closed
 - organ
 - complex
 - Oxygenated
 - kinetic
 - None
 - Open

Now knowing that chordates have a complete digestive system and a closed circulatory system and because reptiles are vertebrates, they are chordates, choose the best answer.


 

  Closed       