We are an intriguing species. The human body is a scientific marvel. Below is a complication of some weird and wonderful facts about the human body.

The human body has been meticulously designed to keep us alive and thriving. Despite being a relatively small species within the Animal Kingdom, we are, in fact, enormous. The human body has all its vital organs very neatly packed, and the sheer size of them is unbelievable.

Our organs appear small, and tightly knitted DNA in each cell makes it even more incredible that stretched out consume massive space and are pretty large in size.

If you ever wondered how large your lungs are, how much hair you lose, or why babies have more bones than adults, continue reading. These 40 intriguing facts about the human body will leave you amazed with your own body and how it works tirelessly to keep you alive.

Bizarre Facts About The Human Body

1. The lungs are essential to human survival. They provide us with oxygen and are in fact really enormous. Despite being packed so neatly in the chest the lungs when smoothed out could over a tennis court.

2. The airways in the lungs - the little highways allowing oxygen flow - if stretched out, could cover a distance from London to Moscow.

3. The human body is inundated with blood vessels transporting oxygen around the body. Just how long are these blood vessels? If you were to string them all together, you could wrap your blood vessels around the world two and a half times.

Gross Facts About The Human Body

4. Our intestines are massive. The intestines are positioned to take up less space but still over a great surface area. The small intestine alone is approximately 25 feet long. The small intestine is the heart of the digestive tract as most of your food is digested here.

5. The alimentary canal - this stretches from your throat to your anus - is a whopping 40 feet long for the average-sized man, slightly less for women.

6. The surface area of your alimentary canal is approximately half an acre.

7. Have you ever woken up in the morning with a foul taste in your mouth? Morning breath, as gross as it seems, is extremely normal. Your mouth produces less saliva when you sleep. The lack of saliva in your mouth leads to the production of microbes bacteria that leaves you with a foul-smelling breath in the morning.

Interesting Facts About The Human Body

8. The most remarkable part of the human body is our DNA. The double helix strand sits in each cell of the human body. If all the DNA in your body were to form one single strand, it would stretch over 10 billion miles away from Earth to Pluto and beyond.

9. Another surprisingly large organ is the eyeball. When looking at a person in the eye, you only see 1/6 of their actual eye as the rest is embedded in their eye socket.

10. The human body is covered in hair. The human head has between 100 000 and 150 000 hair follicles. On average, we lose approximately 50 - 100 head hairs a day. The unlucky few are the ones whose hair never grows back.

11. The human brain provides everything that we know about the world. The brain itself has never been in contact with the outside world. Due to no pain receptors, it has also never actually felt pain.

Weird Facts About The Human Body

12. Your mouth is home to one of the strongest muscles in the body, the tongue.

13. The tongue has the most regenerative cells in the body. Approximately every ten days, all the receptor cells found on the tongue get replaced.

14. We do taste with our noses. The smell of something amounts to between 70% - 90% of the flavor.

15. You smell the aroma of the food you eat through the back of your nasal passage. This is called the retronasal route.

Amazing Facts About The Human Body

16. The human heart works tirelessly to pump blood to every part of the body. The heart pumps around 260 liters of blood every hour, that is 6240 liters of blood a day.

17. A child is born with only 1/2 a pint of blood. An adult has around 9 pints of blood in their body.

18. A child is born with 300 bones in their body. As they grow, many bones fuse together, resulting in adults having 206 bones.

19. One-quarter of your bones are in your feet.

20. A 20-week old female fetus will already have all the eggs in her ovaries that she needs in life. This is approximately 6 million eggs. A mother is carrying the DNA of her potential grandchildren while pregnant with her daughter.

21. A fetus develops fingerprints at three months.

22. Opposable thumbs are what makes humans stand out from other mammals on earth. The human thumb has three small muscles that are not found in any other primate. These muscles allow us to grasp and manipulate tools with accuracy and delicacy.

23. In each human's gut - digestive tract - there are microbes. These microbes create an ecosystem within the gut that is unique to each human.

24. Your immune system works hard to keep you alive. Approximately one to five cells in your body turn cancerous each day, and your immune system kills them.

Creepy Facts About The Human Body

25. A genuine smile lasts between 2/3 of a second and 4 seconds. This is why held smiles can be both terrifying and disingenuous.

26. In your lifetime, you eat approximately 60 tons of food.

27. You are taller in the morning than when you go to sleep at night. This is because the cartilage in your spine stretches while you sleep and compresses during the day.

28. It is impossible to breathe and swallow at the same time.

29. Your stomach acid is so acidic it can dissolve metal.

Intriguing Facts About The Human Body

30. Human saliva contains a painkiller called opiorphin. This has six times the painkilling effect of morphine but is heavily diluted.

31. Your highest blood flow is to your kidneys.

32. In your lifetime, you can produce enough saliva to fill two bathtubs.

33. Your body has over 600 muscles, with the strongest being in the jaw.

34. You can wash as often as your like, but your skin will still contain over 1000 different species of bacteria living on it.

35. Your fingernails grow faster than your toenails.

36. Your ears and nose never stop growing.

37. Earwax is actually a type of sweat.

38. 60% of the human brain is made of fat.

39. The human brain weighs 3 pounds.

40. The human brain is only fully developed by age 25.