1. Every day, your mouth generates around one litre of saliva!
2. There are moments when your brain is more active while you are sleeping than while you are up.
3. You typically blink your eyes 20 times each minute, or 10 million times annually.

4. Your ears and nose are always getting longer, despite the fact that height growth ends once a person reaches adolescence, and gravity is to blame for this anomaly.

5. Teratomas are tumours that can develop their own teeth and hair.

6. When you listen to music, your heart can beat in time with the beat.

7. Humans have 206 bones at the end of their existence as opposed to 300 at the beginning.

8. A human heart can also beat externally.
9. At birth, you had more bones.
You probably believed that the 206 bones in your body have always been there, but think again! Although we are actually born with 300 bones, as we age and develop taller, some of those bones start to fuse together.

10. And the winner of the title of strongest muscle is...
The strongest muscle in your body is actually the one in your jaw, which may surprise you.

11. Exceptional items
Why bother with fingerprints when you have a unique tongue print? Perhaps the next smartphone will use this as a new authentication method.

12. Your nose's reset button is sneezing.
Sneezing may be our nose's method of "rebooting" itself to get rid of all the harmful particles we've breathed, according to a recent discovery by scientists.

13. The human body contains 60,000 to 100,000 kilometres of blood arteries. They would be long enough to circle the globe more than three times if they were removed and set end to end.

14. Despite not being regarded to be bones, teeth are included in the skeletal system.

15. The brain consumes 20% of the oxygen and blood in our bodies despite making up only 2% of our total body mass.

16.Fingerprints may assist wick moisture away from our hands, prevent blisters, or enhance touch, but their exact purpose is unknown.

17. Over the course of an average human lifespan, the heart beats more than 3 billion times.
An adrenaline rush is the reason behind blushing.

18. You lack blood vessels in your cornea. 
Your eye's cornea, which is transparent, shields the pupil, iris, and anterior chamber from injury. Light passes through the cornea's transparency and is processed by the retina before reaching the brain. The cornea, along with cartilage, is the other tissue in the human body without blood vessels, which accounts for its transparency.