Chordates have a complete digestive system and a closed circulatory system, and chordates Chordates Chordates include fish, amphibians, reptiles, birds, and mammals. Given these facts, what kind of circulatory system do fish have among the following options:
- open
 - solid
 - closed
 - three
 - stagnant
 - kinetic
 - complex
 - gills


 

   closed      