Marco

sketchfab

The human body is a complex and intricate machine, made up of billions of cells that work together to keep us alive. It's amazing how much our bodies can do, from breathing and digesting food to moving and thinking. The heart beats around 3 billion times in a person's lifetime, pumping over 1 million barrels of blood. That's enough to fill over 200 train tank cars! The brain uses about 20% of the body's energy, but it makes up only about 2% of its mass. It's estimated that the human brain contains around 100 billion neurons, each one connected to thousands of others. We take our bodies for granted sometimes, but they're truly incredible machines.