The human body is perhaps the most complex compositions ever to have existed.

Jeff Foster, Medical Director of U.K. based health intendance provider H3 Wellness, suggests many of us "take our bodies for granted."

"Information technology is only when we spend the fourth dimension looking at what is really involved in what makes us human being that we realize how amazing our bodies are," he told Newsweek.

"This was something I started to learn about in med school, but 20 years on I am still finding out new, weird and astonishing things well-nigh the body."

Here are some of the well-nigh fascinating facts near your amazing body.

1. You Contain Trillions of Bacteria

microbiome contains trillions of bacteria
The microbiome contains trillions of bacteria Marcin Klapczynski/Getty Images

Dr. Natalie Carter, Versus Arthritis Head of Enquiry Engagement, said: "Nosotros have trillions of bacteria living in our bodies and helping regulate inflammation and illness.

"It has long been suggested they may affect our immune system and contribute to inflammatory arthritis, which affects over 430,000 people in the U.Thou.

"Versus Arthritis is funding inquiry studying the bacteria sharing our torso and so we can better empathize their role in the development and potential treatment of inflammatory arthritis."

2. Your Eye Is Your Fastest Muscle

The eye is the fastest muscle.
The eye is the fastest muscle in the body Getty Images/Mark_Kuiken

Sharon Copeland, an optician at Feel Good Contacts, said the fastest-moving muscle in the human body is the orbicularis oculi, capable of contracting in less than 1/100th of a second.

She said: "A blink typically tin last 100-150 milliseconds. Did you know that you lot glimmer more when talking and less when y'all are reading this is why yous get tired when reading?

"The eye is the fastest muscle in your body – which is why we say when something happens speedily, 'in the blink of an centre!'"

iii. 100,000 Miles of Blood Vessels

blood vessels
An adult man has more than 100,000 miles of blood vessels c1a1p1c1o1m1/Getty Images

Dr. Foster said: "This includes veins, arteries, and communicating trivial capillaries that move between both.

Information technology seems like an unrealistic number, simply if you imagine every unmarried muscle, organ, chip of skin or nervus needs its own way of getting blood and taking information technology away, it's not surprising how much plumbing we demand.

4. Just 2% of Humans Take Greenish Optics

green eyes
Only two percent of humans accept green eyes Getty Images/Nastco

Copeland said: "That's right, merely two percent of the population have green eyes.

"The largest concentration of light-green-eyed peoples is in Ireland, Scotland, and Northern Europe.

"All races, including Asian African Caucasian pacific islanders Arabic Hispanic and the indigenous peoples of the Americas, can have green eyes.

"All babies are born with blueish or brown eyes. Green optics can take between six months and 3 years to announced in children."

v.All Humans Are +99% Identical

DNA
From a Dna perspective, all humans are more than than 99 percent identical Shutter2U/Getty Images

Dr. Foster said: "The visual differences or internal variations that occur in us are only due to a tiny variation in genetics."

"This is also why we are so similar to many other animals – from a genetic perspective."

6. The Skin Is Your Largest Organ

The skin is our largest organ
The skin is our largest organ Sofia Zhuravets/Getty Images

Dr. Foster said: "The peel accounts for almost fifteen percent of our torso weight and its importance is massively under-appreciated.

"It keeps everything on the inside from coming out, merely it likewise helps keep u.s. at the right temperature, helps us with touch and sensation, allows us to move without restriction (not too tight or too loose), heals and regenerates constantly and much more than."

seven. When We breathe, We Favor I Nostril

When we breathe, we favor one nostril
When nosotros breathe, we favor one nostril then the other Andrii Atanov/Getty Images

Dr. Foster said: "We naturally tend to alternating from 1 nostril then the other equally this helps continue the air we breathe moist so every bit not to irritate our lungs.

"But our bodies requite ane nostril a break while the other is active – we just don't know we practise information technology."

8. Nosotros Don't Know Why We Yawn

why we yawn
We even so do not know why we yawn Digital Vision/Getty Images

Dr. Foster said: "Many animals seem to do it, and there are dissimilar theories as to why we do—some say it helps go more than oxygen in, others think it helps regulate temperature.

"Either way, we all do it, we just don't why."

9. Eyes Remain Almost the Aforementioned Size Your Entire Life

Eyes remain almost the same size
Eyes remain almost the aforementioned size your entire life puhhha/Getty Images

Copeland said: "Although our olfactory organ and ears go on growing throughout our lives, our eyes remain the same size from birth.

"By iii months, our optics are the same size that they will always be as the corneas have reached their total width."

She quotes Cornell Academy neurobiologist Howard C. Howland, who stated: "Human optics grow rapidly in the womb and for the first 3 months after nascency."

This is idea to explicate why babies are so beautiful, with their disproportionately large eyes gazing out from those little round faces."

ten. Nosotros Erase and Reform Our Memories

memories
We erase and reform our memories metamorworks/Getty Images

Dr. Foster said: "This is my favorite one. We imagine that when we remember an event or something in the past, information technology is similar playing a recorded file in a computer.

"But actually our encephalon re-writes the retention each fourth dimension nosotros think of information technology, slowly altering it or twisting it over time.

"Therefore, the childhood memories nosotros cherish may have actually been distorted by our brains over many years."

11. Y'all're Taller in the Morning

We are always taller in the morning
We are e'er taller in the morning Choreograph/Getty Images

Dr. Foster said: "If you ever look in the mirror in the forenoon, your stomach is flatter, and clothes and then to hang better.

"Due to gravity, over the daytime our cartilage compresses to brand us slightly shorter and our organs tend to settle."

12. You Can't Exhale and Consume Simultaneously

Breathe
Y'all can not breathe and consume simultaneously millann/Getty Images

Dr. Foster said: "This may sound obvious merely is actually a deliberate evolutionary protective process that stops yous accidentally aspirating/choking on your own food or even spit.

"It also works every bit a way of suppressing a chronic tickly cough. Only consume and you tin can't cough either."

thirteen. Every Second, You Produce 25 meg Cells

Every second you produce 25 million new
Every second you produce 25 1000000 new cells peterschreiber.media/Getty Images

Dr. Foster said: "Every new cell is reproduced from the template of our Dna.

"As we get older it is therefore not surprising that this Deoxyribonucleic acid template gets worn away and errors occur.

"We so age—until nosotros can keep the template perfect, it will always happen."