Chordates have a complete digestive system and a closed circulatory system, and all chordates have jaws. Given these facts, what has a complete digestive system and a closed circulatory system among the following options:
- graptolites
 - Veins and arteries.
 - sunlight
 - graphite
 - fur seals
 - viruses
 - animals with jaws
 - Most plants


 

       animals with jaws  