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40 Bizarre Facts About the Human Body That Would Make Ms. Frizzle Gag

March 15, 2025

Let’s all take a moment to thank our skin for keeping the soupy mess we’re strolling around in together. Could you imagine if this packaging of ours disappeared? We’d spill out onto the floor like a pierced Ziploc bag of pasta sauce.

Horrifying visuals aside, we’re just in awe of our bodies right now. The amount that goes on in there at any given moment is amazing, and the fact that we somehow keep it all contained is just astonishing.

But don’t take our word for it. Check it all out here!

40

Evolution

GRACKED SOME OF US HAVE A MISSING TENDON MUSCLE 12 About 10-15% of people don't have a strong tendon in their wrist that's linked to a muscle that used to help our animal ancestors move around. It doesn't give humans any extra arm or grip strength. — Science Direct / Muscle and Fitness

39

Nose Hair

YOU GROW NOSE HAIRS LONGER THAN THE AVERAGE PERSON'S HEIGHT. A nose hair growing from a single follicle can grow up to six feet in a person's lifetime. Enough for a whole new you, roughly. CRACKED — Roman Samborskyi/Shutterstock
Cleveland Clinic

38

Lice

Geneticists can see when humans lost their primate hair by the divergent evolution of pubic and head lice. DNA comparisons between the human head louse and pubic louse indicate a common ancestor about 12 million years ago. CRACKED NOW YOU KNOW — Nature

37

Nail Growth

Your hair and nails don't continue growing after you die. The skin dries up and shrinks away from the base of the hair and nails, giving the illusion — Source: BBC

36

Bite Force

The average human can generate up to 200 pounds of bite force. GRAGKED.COM We have the necessary force to easily bite off a finger, but our brains stop us from doing so. For reference, a Piranha has a bite force of 72, and a rottweiler has one of 335. — Source

35

Brain Freeze

Sphenopalatine ganglioneuralgia is the medical term for brain freeze. CRACKED COM The pain response to the cold sensation in your mouth is thanks to sensory neurons that ping the brain after a change in temperature. — Source

34

The British Man with Ovaries

A BRITISH MAN HAD A FULLY- FUNCTIONING FEMALE REPRODUCTIVE ORGAN. The man, called Rob was thought to have bladder cancer after seeing blood in his urine. It was, in fact, his ovaries that were causing him to pee blood. Rob has a condition called Persistent Mullerian duct syndrome (PMDS). CRACKED.COM — Source

33

Cholesterol

What you eat affects your blood cholesterol. It's a common belief that eating, say, eggs will raise your cholesterol levels and put you at risk for heart and artery disease. But research has shown that the cholesterol you eat doesn't really affect the amount of cholesterol in your blood. CRACKED — Source

32

Scent

Why are you supposed to spray perfume on your wrists and neck? They're some of the places on your body where your blood vessels are closest to the skin, meaning they give off heat, which helps the scent of your perfume or cologne last all day. CRACKED — marinafrost/Shutterstock
Perfumeson

31

Kidneys

CRACKED YOU FILTER ONE MILLION GALLONS OF WATER. Throughout their life, the kidneys will filter out around one million gallons of water and turn it into urine. — Ground Picture/Shutterstock
Good Housekeeping

30

Your Heart

CRACKED BEING UNDERWATER SLOWS DOWN YOUR HEART. When you hold your breath and go underwater, your face and nose get wet. A reaction known as the dive reflex causes your heart rate to slow down, to stop your breathing for a bit, and to make your blood vessels narrower. — Francesco Faconti/Shutterstock
National Center for Biotechnology Information

29

Eating Boogers

BAD HABITS that are good for you EATING BOOGERS can boost your immune system. Listen, don't do it in front of anyone, but consuming bacteria from your nose might help you fight it off and even protect your teeth, so if you gotta, you gotta. CRACKED — Andrii Iemelianenko/Shutterstock
CBS News

28

Bacteria in Roman Medicine

CRACKED AN ANCIENT ROMAN SCHOLAR WARNED US ABOUT BACTERIA. Marcus Varro believed that diseases were caused by tiny, invisible creatures that lived in swamps. Не warned people not to build homes near one, because these creatures could float in the air and enter your body through your nose or mouth. — Public Domain/Wiki Commons, grebcha/Shutterstock
Royal College of Physicians of Edinburgh

27

Muscle Tissue

The Inland Taipan kills you by overloading your kidney with dissolving muscle. CRACKED.COM Your muscles start to dis- solve into your blood after a bite from Inland Taipan. The victim typically dies due to kidney failure as kidneys cannot handle pro- cessing all the dissolved muscle tissue. — Reptiles Magazine / Wikipedia

26

Hamish Syndrome

There is only one person with Hamish Syndrome, where one kidney is located in the leg. Renel capsule Cortex Renal pyramids Renel artery Perirenal fat Renel vein Renel pelvis Renel fascia Pararenal fat Renal papilla ureter Named after Hamish Robinson, the condi- tion is believed to be caused by a missing chromosome named 7p22.1. Both kidneys are fully functional. CRACKED NOW YOU KNOW — Med News

25

Skin

The skin of all human beings is covered in stripes. GRACKED.COM They are cellular relics of our development from a single cell to a fully formed human called Blaschko's Lines, and they cover the body from head to toe. — MentalFloss

24

Penis Enlargement Surgery

Guys: Doctors can take skin from your forearm and use it to increase the size of your penis. CRACKED.COM — Source: 30 Medical Facts You'll Swear Are B.S. (But Aren't)

23

Fetuses

15 THINGS YOU CAN CRACKED.COM DO WITH A BUM CREATE A HUMAN BEING THE FIRST THING THAT FORMS IN A FETUS IS A DIGESTIVE TRACT AND AN ANUS. Baby Got Back Your butt was the first part of you to exist. Your body was formed around it. We all started out as an asshole! — Source

22

Fish

Apparently, teeth come from our fish ancestors. Ancient fish had dermal denticles - - small, spiky scales that some fish, like sharks or mantas, still have. Scientists think that, as those fish evolved into land animals, the denticles moved from the skin and into the mouth, where they became teeth. NOW YOU KNOW CRACKED.COM — Source: 13 Movie & General Now-You-Know Facts To Rev Up Your Gray Matter

21

The Pinky

50% of our hand strength comes from our pinky. The index, middle finger, and thumb are most adept at function- while the pinky and ring finger are the most powerful. CRACKED.COM — Source: The New York Times

20

Egg Cells

HUMAN EGG CELLS ARE ABOUT AS WIDE AS A STRAND OF HAIR IS THICK The egg cell is the largest of the cells in the body. It can be seen without a microscope. CRACKED.COM — Source: CBS News

19

Smiling

SMILING WAS INVENTED IN THE MIDDLE/AGES. Mouth curling was still around, but the teeth-showing, eye-crinkling smiles weren't a common way to express pleasure until after the invention of dentistry. CRACKED.COM — BBC

18

Transplants

1962/ Lung 1 963 Liver First human organ Kidney transplant from deceased donor. 2018 First successful penis and scrotum transplant. CRACKED.COM — Source: 18 Ways Technology Has Changed In A Short Time

17

Stem Cells

A fetus can loan stem cells to its mother. If a pregnant mother experiences organ damage, her fetus will send stem cells to help with the repair. NOW YOU KNOW CRACKED.COM — Source: 22 Kinda Gross Facts About The Human Body That'll Make You Feel A Little Uncomfortable

16

Cerebrospinal Fluid

THE GOOEY STUFF COMING OUT OF YOUR NOSE MIGHT BE YOUR BRAIN'S CEREBROSPINAL FLUID (GSF). CSF surrounds the brain, contained within a lining called the dura. Sometimes, the fluid may leak through a hole into your sinuses, and run out of your nose like a river of clear snot. CRACKED.COM — Source: 14 Fascinating, Super-Disturbing Facts About The Human Body

15

Heads

THE HUMAN HEAD REMAINS CONSCIOUS FOR SEVERAL SECONDS AFTER IT'S BEEN CHOPPED OFF. THE BRAIN RECEIVES NO TRAUMA FROM A CLEAN DECAPITATION, AND MAY CONTINUE TO FUNCTION UNTIL BLOOD LOSS CAUSES UNCONSCIOUSNESS AND DEATH. THERE HAVE BEEN MANY EXAMPLES IN HISTORY WHERE A SEVERED HEAD CHANGED FACIAL EXPRESSIONS AND EVEN TRIED TO TALK! CRACKED.COM — Source: 14 Fascinating, Super-Disturbing Facts About The Human Body

14

Female Facial and Body Hair

In Ghana, facial and body hair on women is considered beautiful. Ghana That includes leg hair, arm hair, and even chest hair. Sometimes, less hairy Ghanaian women jokingly tell hairier ones, If it were for sale, I would buy some. NOW YOU KNOW CRACKED.COM — Source: The Guardian

13

Earwax

What is earwax made of? Earwax is sweat, skin, hair, and debris held together by a fluid made by glands in your ear canal. — Source: Michigan Medicene

12

Thumbs

BREATHE ON YOUR THUMB By sticking your thumb in your mouth and blowing on it, you can activate your vagus nerve, which runs down your neck. This should calm your heart rate and lower your blood pressure. Some experts say that just blowing on your thumb when it's not — For details, read 5 Insane Ways to Abuse Your Body to Greatness (Tested)

11

Stretching

Stretching before/after an exercise doesn't reduce muscle soreness. CRACKEDCO Hey, if your doctor tells you TO, listen to them, not uS, though! — Source: NIH

10

Tonsils

40 Bizarre Facts About the Human Body That Would Make Ms. Frizzle Gag — Source: How Stuff Works

9

Sunburns

Sunburn is your skin bravely killing itself. The sun has altered your cells' DNA, SO they commit suicide to avoid becoming cancerous. NOW YOU KNOW CRA

8

Wisdom Teeth

Our brains pushed our wisdom teeth aside. The brain takes up space that the mouth used to occupY. Your teeth just never got the memo. NOW YOU KNOW CRA

7

Wedding Rings

The wedding ring is worn on the fourth finger because people used to believe that the finger had a direct vein to the heart. Wedding rings are the old

6

Toothaches

IN CASE OF TOOTHACHE, APPLY ICE TO YOUR HAND. Rubbing ice on the back of your hand, between your index finger and your thumb, has been shown to soothe

5

Necks

Washing your hair in a salon can give you a crippling stroke. It's called beauty parlor syndrome, and it happens when your neck artery gets torn bec

4

Bacteria

YOUR BODY IS HOME TO MILLIONS OF FOREIGN BACTERIAL SPECIES. According to new research, your mouth has more bacteria living in it than there are human

3

Tumors

IF YOU THINK CANCER IS THE MOST TERRIFYING TUMOR, THINK AGAIN. These horrifying tumors, called teratomas, can grow real teeth, hair, bones, intestines

2

Mites

CRACKEDOO There are microscopic creatures living, mating and pooping on your face right now. These are known as Demodex mites. They usually collect al

1

Dead Skin Cells

CRACKEDCON The fibrous matrix of loofah scrubs traps the dead skin cells that you have just scrubbed off of your body, attracting bacteria that feed o

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