HealthiQuiz

Are These Bizarre Facts About the Human Body True or False?

You’re gonna know yourself a little better after this quick quiz.

1/10
QUESTION 1

Your hair and fingernails continue to grow after you die.

Please Select an Answer.
Correct
Wrong

Nope—you won’t need manicures in the afterlife

Johnny Carson once joked, “For three days after death, hair and fingernails continue to grow, but phone calls taper off.” That’s amusing—but untrue (at least the first part).  

The growth of your fingernails and hair is one of many bodily functions regulated by hormones. Your hormone production stops after death, so there’s nothing prompting your nails and locks to keep growing. Without hormones, that also means you’ll stop sweating, feeling hungry, having periods, getting aroused, and tons of other bodily functions.

2/10
QUESTION 2

Your stomach rumbles to alert you when you are hungry.

Please Select an Answer.
Correct
Wrong

TBH, it’s rumbling all the time—you just can’t hear it

Your digestive system has to contract regularly to move food through. This process, called peristalsis, occurs in waves, beginning in the esophagus and going all the way through the intestines. That shifting even helps the small intestines absorb nutrients (so all the vitamins in that kale salad don’t go to waste). This is why you may hear gurgling after a meal: Your stomach and intestines are squishing, churning, and squeezing food through your body.

Even once your intestines are mostly cleared out, those muscles still have contractions to get the last little bits through. When those intestines are empty and hollow, the vibrations from the contractions are less muffled, causing the loud rumbling called borborygmus. It’s not exactly an intentional message telling you to eat—but it does tend to happen when you’re  hungry.

3/10
QUESTION 3

The average person produces about 360 pounds of poop a year.

Please Select an Answer.
Correct
Wrong

Well, that’s quite a load

Your bowel movements are a big deal—literally and figuratively. After your digestive system absorbs all the nutrients from your fabulous quinoa bowl, your large intestines converts what’s left into, well, poop. Your feces is about 75 percent water, and the rest is composed of indigestible fibers, dead bacteria, fats, salts, and protein.

You can actually learn a lot from your poop. Consider that your doc may use a stool sample to check for infections, or they might ask you what your poop shape and color tends to look like to diagnose you with certain digestive problems.

4/10
QUESTION 4

Your armpit sweat smells worse because it’s in a crevice and doesn’t get to “breathe.”

Please Select an Answer.
Correct
Wrong

Your armpit sweat is a little different.

Your body has two types of sweat glands: eccrine glands and apocrine glands. Your eccrine glands—which cover most of your body—pump out a watery and mostly smell-free sweat. Their main function is to help cool off the body while you hang out at the beach or on the treadmill. That’s why the sweat on your face doesn’t necessarily give off a stank.

Apocrine glands are found in the armpits and genitals. Driven by hormones, emotions, exercise, or messages from the brain, your apocrine glands produce a thicker, more oily sweat that bacteria love. The bacteria in your sweat is what causes the smell—not the sweat itself.  

5/10
QUESTION 5

The human brain weighs about 10 pounds.

Please Select an Answer.
Correct
Wrong

Your noggin is about 3 pounds.

About 85 percent of your brain’s weight comes from an area called the cerebrum, which is the part that makes all your thinking, memory storage, and voluntary muscle movements. (Your involuntary actions—like breathing—happen in the brain stem.)  

The brain takes up about 2 percent of your body weight, but around 20 percent of your energy. It takes a lot of calories to fuel your mind, which is like the control center of everything else you do. (So THAT’S why you get cranky, confused, and shaky when you’re hangry.)

6/10
QUESTION 6

Adults have around 300 bones; babies are born with around 200.

Please Select an Answer.
Correct
Wrong

Surprise! It’s just the opposite.

Despite their tiny bodies, babies are actually born with around 300 bones. The bones don’t dissolve or disappear; they merely fuse together.  Even crazier, you have more than 100 bones in your hands and feet alone.

As dead and rock-like as your bones may seem, they are actually a living, growing, evolving part of your body—just like your heart, brain, and other organs. For example, at birth, many of your bones are actually composed up of a softer material called cartilage. With help from a proper diet (including ever-important calcium), your cartilage becomes replaced by stronger bones by about age 25.

7/10
QUESTION 7

Your teeth are stronger than the bones in the rest of your body.

Please Select an Answer.
Correct
Wrong

Thank the tooth enamel

Your teeth may be tiny, but they can withstand quite a force. Thanks to the enamel coating your biters, they are actually harder and stronger than any other bone in the body—as long as they’re healthy.

Poor oral hygiene, too much booze, and a carb-heavy diet are all linked to a weakening of your tooth enamel, which can put you at risk for dental problems down the road.

8/10
QUESTION 8

If you shave your pubic hair, it will grow back thicker.

Please Select an Answer.
Correct
Wrong

Nah, it’ll grow back just the same

You have a specific number of hair follicles in your bikini region. New follicles won’t emerge just because you shaved your lawn, so your pubic hair won’t grow back thicker or coarser. However, if you shave your pubic hair, it may seem coarser since the ends are blunted.

And remember: how you groom (or don’t groom) your pubic hair is up to you. Removing pubic hair may lead to razor burns and painful ingrown hairs, and it might increase your risk of infection. But safe practices, clean equipment, and good hygiene can reduce the risk of injury. The choice is yours!

9/10
QUESTION 9

The average person farts about 15-20 times a day.

Please Select an Answer.
Correct
Wrong

Farting is totally normal, you guys

The science is in: The average person farts somewhere around 13 to 21 times a day, according to the National Institute of Diabetes and Digestive and Kidney Diseases. This gas enters your bod when you swallow food, or it can be created in the large intestine while you break down certain indigestible foods. For example, your intestine might get more gas from carbs—sugars, starches, and fibers—like vegetables, wheat bran, dairy, and fruit juice.  

Farts are normal, but talk to a doc if you experience other symptoms with your gas, like constipation or diarrhea. That may signal a digestive problem, like lactose intolerance or IBS.

10/10
QUESTION 10

And finally: A man’s shoe size is correlated with his penis size.

Please Select an Answer.
Correct
Wrong

Sorry, there’s no link between the two

Not only have scientists not found a correlation between the size of a man’s sneakers and his penis, but there’s only a small link with height, weight, or BMI.

Speaking of “penile length” (as the scientists politely call it), it turns out a good portion of adults overestimate just how big the male member should be. One study in the International Journal of Impotence Research found that 85 percent of male patients who visited a clinic with concerns about their self-diagnosed “small penis” estimated a normal penis to be about 10 to 17 centimeters. In reality, the most penises measure up around 9 centimeters (flaccid) and 12.5 centimeters (erect).

Quiz Results

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Reviewed by: Preeti Parikh, MD . Review date: May 9, 2018
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