Crocodilians differ from other (nonavian) 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 have a four-chambered heart, which separates oxygenated and deoxygenated blood, allowing for more efficient oxygen delivery to the body. This is a defining characteristic that sets them apart from other reptiles.

Crocodilians Differ from Other (Nonavian) Reptiles in That They Have