Misconceptions About the Human Body
Vložit
- čas přidán 26. 05. 2022
- What is the real sixth sense? Is 98.6 degrees Fahrenheit actually the normal body temperature? And how many bones do humans REALLY have?
The human body is incredible and confusing. Let's figure out what's true and what's a myth about the thing that unites us all: bodies.
Host Justin Dodd (@juddtoday) breaks down some common myths and misconceptions about the human body.
Website: www.mentalfloss.com
Twitter: / mental_floss
Facebook: / mentalflossmagazine
When I'm cold I put on socks. Afterward, I warm up quick.
Feet have a lot of surface area 🤷♀️
6:00 I have always known I was cooler than my parents. And my parents were cooler than my grandparents.
If my forehead gets too cold, it can trigger a migraine, so I’m wearing a hat when others around me are going bareheaded. As a friend put it, my hat is a headache prevention device.
I’m the opposite. Heat triggers it for me. Especially if I’m sleeping in a hot environment. Funnily enough if I have a migraine I can walk around in the freezing cold without a coat and my head won’t hurt and the other symptoms (light/sound/smell sensitivity and nausea) disappear too.
Sikorsky Aircraft discovered that providing a cooling helmet for the pilots resulted in them keeping their headsets on even in hot environments. They FELT cool even though their body was hot. Keeping the brain cool is very important!
I suppose if you see a mathematical equation and are overcome with dread, you are basically "feeling" that equation, right?
My normal temperature is 97.6°F. the story I got back in school was that Farenheit measured his body temperature and set that as 100°F. He may have had a bit of a fever that day.
Kind of stretching it with the number of bones segment. If "most people" have a certain number of bones, but some have more because of what you call "extra" ribs or "extra" digits, then there's still a typical number that can be relied on to describe the most likely to be encountered case.
Most people can see in colour, but just because there are some people who can't distinguish between certain hues, or can only distinguish between levels of brightness, we wouldn't refer to being able to see in colour as a misconception.
I've heard several times about the misconception regarding heat loss through the head. Firstly, the people who recommend wearing hats are probably assuming that the person is not naked. So yeah, the rest of the body is more insulated by clothing, but that is a given isn't it? Secondly, why does the body have so much blood flow close to the surface on the scalp ( scalp wounds are famous for massive bleeding and looking like you're gonna die) unless it is to dump heat? Hair doesn't need that much blood blow and the surface vessels do not supply the brain. Surface blood vessels could be explained on the face for social cues (blushing), but that doesn't make sense on the scalp. I don't want to hear any bald jokes. We also all know that the body uses blood flow near the surface to moderate heat loss: too hot and the skin gets red, too cold and the skin will eventually turn very pale as the blood flow is concentrated in the core. All of this makes me wonder about the "misconception" regarding heat loss through the head. Maybe it is not as big as some make it out to be, but I don't see how it can be reasonably stated that it is equal to other body parts in heat loss.
I completely agree. I don't think it's a misconception at all. And the concept is way older than the 70s, too.
I’d love to get rid of about 6 bones. I’m always hanging up my pinky toe on furniture. Hurts like hell.
Surely we don’t need that last toe.
We need it to tell us when we run into the furniture. If we didn't have the pinkie toe, we'd just hit the toe next to it, instead.
Mr. Boynton, the biology teacher in Our Miss Brooks, had six toes, at least in the radio show.
3:30 When you said the thermometer was a foot long, "stuck in their..." I did not expect to hear "armpit."
Why was it so long?
probably for precision. If you have a longer thermometer it is likely to have larger gaps between numbers, allowing you to accurately read decimal points. Before we got a digital Density Meter at my work, we used hydrometers to measure specific gravity of beer. A smaller one for a quick ballpark progress reading, larger more precise ones for Original and Final graviites.
In addition to bonus ribs and extra digits, there are also possible sesamoid bones -- tiny bones formed within tendons -- that can pad the total number by up to 42, by some odd coincidence... or _is it_ ? As for proprioception, I've long been keenly aware of that one, because I have lacked it almost completely in my lower legs and feet since birth. I have to watch my feet anytime I'm on uneven terrain, including curbs and stairs, and even entering and exiting escalators and moving walkways.
It was the kid that could see dead people, not Bruce Willis, right? So he would have the opinion on the extra sense.
Regardless of whether you lose most heat through your head, I feel much warmer in the Winter if I wear a hat.
I imagine you also feel much warmer if you wear clothes rather than going outdoors naked mid-winter.
Of course there are a lot more than five senses. Just check out the Animaniacs song on the subject! (Woot, second time I can toss Animaniacs into a Mental Floss video comment section~!)
I have an extra bone in each of my feet! I only found out because I injured one of them and couldn't easily explain where the pain was, so they did an MRI and found it!
7:08 Padua? Maybe he was at the Padua University at that time, But Andreas Vesalius was not from Padua, he was from Overijse and studied at the University of Leuven, where he also did his first research.
The heat lost through the head thing is way older than the 70s. Like 100 years older. the mountain men had a saying "If your feet are cold, put on your hat."
I miss John green
I love how this all comes out AFTER covid😂😂😂
Good video :)
I'm missing some joints in my toes, therefore technically have less bones than the "standard".
One thing I'm bugged the most is "Our brain is more powerful than a supercomputer." It's very controversial of a topic, sure, our brain performs more powerful as one, however, we're extremely weak in terms of memory and calculations, if we're given "7658 x 964", we can't calculate the answer without calculators to assist us. Even a simple mistake in life can cost a lot, we might as well have SSD chips instead.
Synesthesia sounds like a superpower.
I remember when I had 360 joints in my body and one in my pocket
°L°
I thought it was 420?
Not all humans have two arms and 2 legs. So how could all humans have the same number of bones.
0:07 i always thought because there is proportionally FAR more blood in your head
i miss john, can we have john back? Meredith???
You can also tell how hot or cold water is by listening to it
Wow, this is some remedial stuff for someone like me, but thanks anyways!
My temperature is 96.6 always
My normal body temperature is like 97.3 and has been as low as like 96.9
from the start of this video if you assume that if you don't wear socks then your feet will get cold. Common sense is not apparent here. If you are still confused just replace "feet" with "head".
Synethesia can be trained.
Doesn't the body try to keep the brain warm? If the brain loses heat, the blood flow increases to keep the brain warm.
False. We do not all have bodies. I am a robot.
I've a question about your human body, why do you only have tattoos on one arm, what's wrong with the other one?
Wtf is a fair in height?
How about the misconception of humans having blue blood?
Until it hits the air/oxygen.
@@Melinda8162 ugh. See? People still believe this. Human blood is only ever shades of red due to the iron in out hemoglobin. The only animals that have blue blood are horseshoe crabs and species of spiders because their blood uses hemocyanin. Key word there being "cyan". Not only does human blood transport oxygen in the first place. Even deoxygenated blood is still red. When doctors stick a scope into a person's veins or arteries for surgeries they never encounter blue blood. When blood comes out of a tube for an IV, even when it's been running for a few minutes the blood is still red.
If we had blue blood ever, we would blush blue, not red. White people wouldn't look pink. When you shine a flashlight through your hand you can see the red/pink of your blood. It only looks "blue" on the veins because much less light passes through causing it to be much darker.
Please, it's 2022, no-one else uses Fahrenheit.
Yawn. Call us when you switch to metric time.
Nobody cares. Start your own CZcams channel if you don’t like it.
@@KittySnicker Literally almost the entire rest of the world that isn't the USA, cares.
The US is the only large nation still primarily using Fahrenheit (together with Liberia, and a handful of Pacific & Caribbean island nations, & some of these being dual use with Celsius).
Having/referencing both for a US channel widens the audience & hurts no-one.
I think 37 degrees is normal.
"The body replaces cell types every seven to 10 years with the exception of neurons in the cerebral cortex, which stay with us from birth to death."
Red Blood Cells have a lifespan of roughly 90 days, most bone cells somewhere between 90 and 120 days...lots of "stuff" dies off and is replaced on a regular basis...read some physiology texts why don't you...start with Guyton's.
@@brianfoley4328 Stop strawmanning why don't yout, starting with this comment.
Didn't really answer anything there, did you?
Added more than your comment did
Dude, you said that it wasn't 98.6, but it's legit .7 degrees off of what is found now, 97.9. Like I want real misconceptions not bullshit like this that doesn't teach me shit
Math is hard
This video taught no actual misconceptions. This channel only gets worse and worse