Why does the heart of a frog keeps on beating after it was removed frm the system?

The heart of a frog continues to beat after being removed from the body due to its intrinsic pacemaker cells, which generate electrical impulses that trigger contractions. These cells can function independently of the nervous system or hormonal signals. Additionally, the heart's muscle tissue is capable of rhythmic contractions as long as it remains supplied with oxygen and nutrients, even in a non-functional body environment. This phenomenon demonstrates the inherent properties of cardiac muscle tissue.