The largest organ in our body is (wait for it!) our skin!
Anton van Leeuwenhoek was the first to see microorganisms under a microscope in in the 1670s but it took until the 1860s before the “germ theory” was proposed by Louis Pasteur.
How do you protect yourself against pathogens (viruses and bacteria)? The combination of soap, water and time is your best defense. You need to wash the entire surface of your hands (including between the fingers!) with soap for 15-30 seconds before immersing your hands under water so that the germs slide off your body and go down the drain. Sing Happy Birthday to yourself twice while you soap up and that should cover your 15 seconds.
If you added up the number of humans who have ever walked the planet, the number of microbes in your gut would exceed this! We have about 100 trillion (yes, trillion!) microorganisms in our intestines
Your eyes stay the same size all of your life. Your ears and nose never stop growing! There is a little Pinocchio in all of us!
We have 300 bones when we are born but the number is reduced to 206 by the time we are adults. Where did we lose them? We have unfused bones in our skull at birth, making it easier for us to pass through the birth canal. As we grow, those bones harden and fuse together.
Hugging produces oxytocin. This helps in the healing of physical wounds.
Your tongue is the strongest muscle in your body! And every tongue print is unique (yes, even identical twins have each have a unique tongue print).
A sneeze generates a wind that regularly clocks in at more than 160 km/h! This is why it is important to cover your mouth with your sleeve when you sneeze. Think about how far those germs would spread otherwise! By the way, did you know that it is impossible to keep your eyes open when you sneeze?
If you were to guess, when would you think that your brain is more active: during the day or at night? If you guessed at night, you’d be right! Also, you burn more calories sleeping than watching TV.
Our blood travels 96 600 km per day. And we generate over 200 billion red cells every day. Oh, and blood is six times thicker than water!