Crocodilians differ from other reptiles in that they have
A) separate pulmonary circulation.
B) lungs and no gills.
C) an open circulatory system.
D) more muscular atria.
E) a four-chambered heart.

Question

Quizplus · Accepted Answer

Crocodilians are unique among reptiles in that they have a four-chambered heart, like mammals and birds. This adaptation allows for more efficient oxygenation of the blood and better control over circulation, making them better suited to their semi-aquatic lifestyle.

Crocodilians Differ from Other Reptiles in That They Have