Why is the the frog able to live with only one ventricle?

Frogs have a unique circulatory system that allows them to thrive with only one ventricle. This ventricle receives both oxygenated and deoxygenated blood but is equipped with structures that help separate the two types to some extent. The lower metabolic demands of frogs, especially during periods of hibernation or inactivity, enable them to efficiently circulate blood without the need for a fully divided heart. Additionally, their ability to absorb oxygen through their skin supports their respiratory needs in various environments.