More Than a Pump 3D Blood Flow Inside the Human Heart 🫀 - - Your heart beats about 100,000 times a day and moves nearly 7,000 liters of blood without a single conscious command. This tiny pump keeps every cell alive by delivering oxygen and nutrients and carrying away waste with each beat. In this 3D animation, you can clearly see how blood flows through the heart deoxygenated blood returns from the body, enters the right atrium, then the right ventricle, and is sent to the lungs. Oxygenated bl