Endothermic animals with four-chambered hearts include the
A) amphibians.
B) reptiles.
C) fish.
D) arthropods.
E) birds.

Question

Quizplus · Accepted Answer

Endothermic animals have the ability to regulate their body temperature internally, and four-chambered hearts are necessary for the efficient circulation of oxygenated and deoxygenated blood, especially at high activity levels. Birds are the only endothermic animals with four-chambered hearts, making them the best choice. Amphibians, reptiles, fish, and arthropods are all either ectothermic (relying on external sources for body heat) or have less efficient circulatory systems.

Endothermic Animals with Four-Chambered Hearts Include the