#65+ Body Facts I Had to Read Twice to Believe. So have you ever wondered how many atoms there are in your body and why do your veins look blue instead of red. well let's poke around the human body and see what's going on. interesting facts about the human body.fun facts about the human body.interesting facts about humans.amazing fact on the human body.facts about the human body. Fact's. *Goosebumps are an evolutionary reflex leftover from our ancestors. the release of adrenaline made their hair stand up and they look scarier to approaching predators. *The beating sound your heart makes is the clap of valve leaflets opening and closing. *Your heart doesn't replicate itself unless you have an injury. *Your corneas are the only parts of your body that don't get the blood they get oxygen directly through the air. *The human brain has 100 billion neurons give or take. the vessels in your body are long enough to circle the Earth twice o...