How much do you know about the human body? | National Geographic

Inside the Human Body — A Mind-Blowing 3D Reveal 🔥 . . Step inside the human body like never before. This 3D animation reveals every major system layer by layer — the beating heart, the expanding lungs, the liver, stomach, and intestines, all protected by a complex network of muscles, vessels, and nerves. Watch how each organ sits perfectly in place, how the diaphragm separates the chest from the abdomen, how arteries and veins spread like a living map, and how the muscular system wraps around