25 Crazy Facts about the Human Body You Wish You Knew Sooner

The human Body is fascinating, to say the least. With the advancement of science and technology, now we know a lot about our bodies. In this post, we will be talking about 25 crazy facts about the human body. So, if you are here to learn about the enigmatic human body, you can start to read on the rest of this post.

Let’s get started…

25 Crazy Facts about the Human Body

#1 Blood Vessels:

Crazy Facts about the Human Body

There are primary 3 types of blood vessels on our body. And, if you could measure the length of all the blood vessels on our body, then it would be about 60,000 miles or 100,000 km long.

Compared to that, the circumference of the Earth is about 24,860 miles or 40,075 kilometers. In that regard, all the blood vessels on the human body can actually wrap around the earth 2.5 times.

#2 Bacteria:

Crazy Facts about the Human Body

There are over 7 billion peoples in the world. Now, there could be from 100 million to 1 billion bacteria on each tooth of a human. So, if you combine all of the bacteria in the mouth then the quantity would be higher than the population on Earth.

#3 Your Teeth:

Crazy Facts about the Human Body

Everybody has unique teeth. It is like fingerprints. Your teeth will not match with any other’s teeth. Matter of fact, teeth are the only part of the human body that cannot heal themselves. Another interesting fact about teeth is that the wisdom teeth have no purpose in our body.

#4 Bones:

Facts about the Human Body

Steel is one of the strongest alloys in the world. But interestingly, there are some bones in our body that are up to 5 times stronger than steel. Also, when you were a child, you had about 300 bones in total. But, an adult humanizing has only 206 bones.

#5 Goosebumps:

Do you know what the purpose of Goosebumps is? Interestingly, it is an evolutionary character of the human body. We know that during Goosebumps our body hairs stand up. This particular trait would make us look more threating to the predators back in the day. That means it is a survival trait of the human body.

#6 The Pinky Finger:

Facts about the Human Body

You might think that the pinky finger is the weakest and useless of them all. But that is not the case at all. In fact, hand surgeons seem to agree that the best finger to lose (we really don’t hope that you would lose your finger, though) would be the index finger. And, if you lose your pinky finger, you would lose about 50% of the total hand strength.

#7 Human Eye:

Facts about the Human Body

Your eyes will remain the same size from the time you were born. Over time, it will not grow or change the size. But our ears and nose actually grow as long as we are alive. If you compare the capability of our eyes to a camera, then our eyes would be a 576-megapixel camera. Interesting, isn’t it?

#8 One Step Equals:

Fun Facts about the Human Body

Human beings started to walk using their feet about 3 to 6 million years ago. It was also an evolutionary trait. However, for taking a single step, our body needs to use 200 different muscles at once.

#9 The Liver:

The largest internal organ on our body is the liver. This is the only visceral organ in our body that can heal and regenerate itself. In fact, if you have 25% of the liver, it can regenerate to the full size itself. Yes, even after removing the liver surgically, it will grow back.

#10 The Fastest, Strongest & Weakest Muscles:

Fun Facts about the Human Body

Do you know how many times we times our eyes in a day? On average, we blink about 20,000 times per day, which translates to roughly 1 blink per 4 seconds. And, the muscles that are used to blink are the fastest muscles in our body.

Depending on the weights, the ‘Masseter’ muscle is the strongest muscle in the human body. These muscles are located in the jaw region. And, all these muscles together can exert a force from 55 to 200 pounds.

On the other hand, the smallest and probably the weakest muscle on our body is the ‘Stapedius’ muscle. It is just about 2 mm long and can be found in the middle ear.

#11 Your Height:

Fun Facts about the Human Body

Another interesting fact about the human body is related to height. Interestingly, we are taller in the morning than at night. This is because of the gravity of our planet.

During the day, most of the time were are awake and active. As a result, the cartilages and the joints on our body compress due to the activity and the gravity of the Earth.

However, when you sleep at night, then there is no pressure in the joints. As well as the impact of the gravity of the Earth will not be the same on your body as you are lying down. So, you would be taller in the morning after a good night’s sleep.

#12 Human Body Fat:

For men, the healthy range of body fat would be about 8 to 19%. While for women, it would be about 21 to 33%. Still, on average our body contains so much fat that is enough to make 7-8 bars of soaps.

#13 Taste Buds:

Fun Facts about the Human Body

You cannot see the taste buds with naked eyes. However, everybody has different numbers of taste buds. On average, there are about 2000 taste buds in your mouth. And, with time, the taste buds will change or diminish.

Interestingly, most taste buds will grow back. You might think that the taste buds are only located in the tongue. But that is not the case at all. Taste buds can be located in your throats, mouths, and the tongue altogether.

#14 Human Brain:

Fun Facts about the Human Body

Our brain is the largest brain among all the vertebrate animals relative to the body size. The brain is always active even when you are asleep.

In fact, sometimes, it could be more active when you are asleep compared to when you are active and awake. Almost 75% of the brain is made up of water. Our brain stops growing in size at about 18 years of age.

#15 When We Die:

There are thousands and thousands of enzymes in our body that helps to break down our food while we are alive. But after about 3 days of our death, those enzymes will start to eat the body.

#16 New Layer of Skin:

The outermost layer of our skin is known as Epidermis. It is always going through changes. Matter of fact, you get a new layer of epidermis every 30 days.

#17 Bones Facts:

Human Body facts

The longest bone in the human body is located in the leg. It is called ‘Femur’. It runs from the hip to the knee. At the same time, the femur is also the strongest bone in the human body.

Bones are there for handling immense pressure. For instance, a person takes about 1 to 3 million steps in a single year on an average. And, it will not impact the bones negatively at all.

As you already know that there are 206 bones in the body of an adult human. However, almost half of those are located in the feet and the hands. There are about 106 bones that can be found in the legs and the hands.

Also, the bones on our bodies are natural healers. Except for the ‘Hyoid’ bone, every other bone is connected to each other or a joint. But the ‘Hyoid’ bone is not connected to any other bones at all. It is located in the throat.

#18 Heartbeat and Music:

technology and us

Music has a great influence on our body and mind. It can engage many parts of the brain. At the same time, it also can influence our heartbeat.

While you are listening to any music, your heartbeat can change depending on the rhythm of the music. The heartbeat could increase or decrease based upon the type of music you are listening to.

#19 Stomach Acid Facts:

Stomach acid is known by many names. Some call it gastric fluid, or gastric juice, or gastric acid. This is a fluid produced in the stomach. And it is mostly made up of ‘HCL’ aka ‘Hydrochloric acid.’ And, you know how devastating hydrochloric acid can be.

Interestingly, this fluid or stomach acid is there to help us to break down the nutrients like protein, carbohydrate, etc. One fascinating fact about the stomach acid is that it can dissolve metals. Thanks to the mucous coating lining that is on our stomach. It helps to protect the stomach from getting burned by stomach acid.

#20 Testicles:

The skin of the testicle or the scrotum works as a climate control system. Because the temperature of the testicles should always be slightly below to the body temperature for usual semen development.

Also, this is the same reason why the testicles hang a bit below the body. Another intriguing fact is that the testicles can produce about 200,000 sperm within every single minute.

#21 Production of Saliva:


Saliva is very important to human beings. On average, you produce about 1 liter of saliva every day. The afternoon hours are the rime when you produce most of the saliva.

And, the smallest amount of saliva is produced during the evening. On average, a person produces so much saliva in their lifetime that it can fill up two swimming pools of standard size.

#22 Skin Shedding:


Our body skin actually gives off a little bit of light. But that is too weak that we cannot see it with the naked eye. An average person loses about 600,000 to 700,000 skin particles every hour.

In that regard, you are losing about 4 kg or 8.8 lbs. of skin cells per year. In the case of a 70 years old person, he would have lost about 280 kg or 617 pounds of skin cells in total.

#23 Fingerprints or Tongue prints:

finger prints

We all know that everybody has unique fingerprints. Even, the fingerprint on each of your fingers is different from one another. However, did you know that the tongue print of each of us is also unique like the fingerprints? At the same time, you should know that the teeth are also unique as we previously mentioned.

#24 Tears

Typically, tears have 3 layers that are: 1. The lipid layer, 2. The aqueous layer, and 3. The mucous layer. Also, there are various types of tears as well. For instance, the reflex tears are there for clearing debris or dust from the eyes. Another cool fact about babies is that they don’t shed tears until they are about at least 1 month old.

#25 The Ability of Our Nose:

Human Body facts

We all know that we breathe through our nose. But the nose is responsible for a lot of other crucial functions on a human body. For instance, the nose can maintain the temperature of the air that you breathe.

It filters, moistens, and warms the air before passing it to the lungs. Added to that, the nose is also responsible for our smelling ability.

Thus, the ability to smell is related to the ability to taste. Because we use almost the same types of receptors for both smelling and tasting. As a result, if you lose the ability to smell, you will lose the ability to taste something.

Plus, researchers show that about 80% of what we taste is through smell. And, our nose is perfect for smelling and recognizing different scents. Matter of fact, it is possible that the human nose can recognize about 1 trillion different scents. Incredible, isn’t it?

Before We Go—Facts About The Human Body:

Here’s another bonus fact about the human body for you. The human body is made up of 11 elements in total. However, primarily 99% of the body mass comes from the 6 elements that are oxygen, nitrogen, hydrogen, phosphorus, carbon, and calcium.

And, the other about 0.85% of the body mass is composed of 5 elements that are chlorine, sulfur, potassium, magnesium, and sodium. Lastly, the rest of the elements are thought to be trace elements.

We hope, you have liked this post about the best crazy facts about the human body. We have tried to share the most unique and enthralling facts about our bodies in this article. If you have had fun while reading the post, you can share it with others.

And, don’t forget to share your opinions or suggestions in the comments section down below! We would love to hear.

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About the Author: Jakaria Tiaz

Jakaria brings years of extensive experience in tech and business writing to the team. After working as the chief editor for several very large online magazines Jakaria agreed to take part in Tech 25 and help turn it into the leading Tech news and facts site online.