Hidden Circulation Inside the Heart 🫀 - - This 3D animation shows the blood circulation inside the human heart — the part you never get to see in real life. You can follow the blood as it moves through the right side to the lungs and then returns to the left side before being pumped out through the aorta to the rest of the body. In this model, blue blood is used to represent deoxygenated blood (low in oxygen), and red blood represents oxygenated blood (rich in oxygen). In reality, this “blue” b