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 kind of circulatory system does a reptile have?" with the following options: 
- three
 - Closed
 - organ
 - complex
 - Oxygenated
 - kinetic
 - None
 - Open


 

  Closed       