A crocodile belongs to the reptilian class despite having a four-chambered heart because its overall body structure and characteristics align with reptiles. Crocodiles have scaly skin, lay eggs, and are ectothermic, meaning they rely on external sources to regulate their body temperature, which are typical traits of reptiles.

The four-chambered heart is an adaptation that helps crocodiles manage their oxygen supply efficiently, especially since they spend time both in water and on land