Chordates have a complete digestive system and a closed circulatory system.
Because reptiles are vertebrates, they are chordates.
Vertebrates have a complete digestive system and a closed circulatory system.
vertebrates have a complete digestive system and a closed what?
Options:
A. digestive tract
B. lung system
C. the body's largest organ
D. circulatory system
E. Veins and arteries.
F. brain stem
G. all liquids
H. major threat to health