The Yellow Banded Poison Dart frog is generally located in the northern part of South America. It is known for its vibrant yellow and black colors and for its preference of high humidity and tropical environments. The poison dart frog secretes toxins from its skin by eating specific arthropod prey. Unlike humans, frogs have three-chambered hearts. Oxygenated blood and deoxygenated blood enter the heart through different atria. When they contract, they pass through the same ventricle and is pumped into the aorta for oxygen-rich blood and the pulmonary artery for the oxygen-poor blood. The deoxygenated blood is then brought to the lungs where respiration begins and the cycle starts again. When in the common ventricle, the blood never mixes because of the division into narrow cavities. The structure of the heart allows for a higher metabolic rate and for more activity than our, as humans, four-chambered heart allows for.