Chordates have a complete digestive system and a closed circulatory system.
Vertebrates are members of of a larger group, the chordates .
Vertebrates have a complete digestive system and a closed circulatory system.
vertebrates have a complete digestive system and a what?
Options:
[1] Veins and arteries.
[2] lack of backbone
[3] bruised brain stem
[4] critical organs
[5] closed circulatory system
[6] incomplete circulatory system
[7] characteristics
[8] sensory neurons