Organ Jantung (the heart in Indonesian) is a vital organ responsible for circulating blood throughout the body, ensuring that tissues receive oxygen and nutrients while removing waste. It consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle. The heart pumps oxygen-poor blood to the lungs for oxygenation and then sends oxygen-rich blood to the body. It operates through rhythmic contractions controlled by electrical impulses, enabling proper blood circulation. The heart is essential for maintaining the body’s overall function and health.