9 Unbelievable Things Your Body Is Doing Everyday That Sound Next To Impossible

Almost complete regeneration every decade

Every day, about 70 billion cells die in our body, and we don’t even notice. A new intestinal tract appears every 3-4 days; red blood cells die every 3 months; the kidney cells renew themselves over a year. Within a decade, our body undergoes an almost complete regeneration. Some cells live more than a century, though, such as neurons.