Chordates have a complete digestive system and a closed circulatory system.
Yep, lizards are chordates, just like humans.
Lizards have a complete digestive system and a closed circulatory system.
what have a complete digestive system and closed circulatory system?
  * protist
  * sharks
  * cows
  * lizards
  * mammals
  * viruses
  * crocodiles
  * bacteria