The effects of underwater pressure on the body - Neosha S Kashef
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- Опубліковано 1 кві 2015
- View full lesson: ed.ted.com/lessons/the-effects...
Why would a fish throw up its stomach? What makes a scuba diver develop painful microbubbles in their joints? Neosha S Kashef details the basics of barotrauma, shedding light on how humans and fish alike are influenced by laws of physics under the sea.
Lesson by Neosha S Kashef, animation by The Moving Company Animation Studio.
For people outside the U.S a quick explanation : 14.7 psi = 1 bar. 33 feet = 10 meters.
When you a you dive down the ocean, each 10 meters have 1 bar of pressure on you (at sea surface which is 0 meters deep, you have the usual atmospheric pressure which is already 1 bar) . It also adds up, meaning : if you're at 10m deep you will feel 2 bars of pressure, if you're 20m deep 3 bars, 30m is 4bars, etc. Cheers :)
thanks
thank yo so much
Thank you
also, 1 bar is very close to 1 atm. atm stands for atmosphere, because 1 atm is the pressure the atmosphere exerts on you on the surface at around sea level. so if that's a unit you're more used to, there you go
Ummmm
Commentary analysis: of the 34 comments posted currently, 44.1% (15) are complaining about the use of imperial units, 23.5% (8) are complaining about the ethics of catch and release fishing, 8.8% (3) are referential comments, 8.8% (3) are planning to blow up things with air pressure, and 5.9% (2) have claimed first.
15+8+3+3+2 = 31 != 34
Also 1, 0.02% tried to be smart ass by stating obvious of what others been doing...lol may be pie chart would have helped...roflmao ;)
Factoid This comment is just nailing it.
The ½ øƒ 9, Firmware of Unimatrix 01 Not every comment was included. Some just said nice video. Some were counted twice. Mine wasn't included in itself because it wasn't posted before it was made.
Factoid Thank you, now I don't have to read them! You should be on every channel! :P
Factoid okay than, makes sense. Also mine addition of 0.02%'s views was also right I guess as your one was already written when I added my assessment :)
Anyone else wondering if the fish can actually see well after having its eyes expanded?
In humans, barotrauma usually impairs eyesight so I doubt it.
i dont think theirs much light past 700ft so i think some fish wont mind that part too much
we put animals through so much hell omg I wouldn't even wanna live if my eyes popped outta my head and my stomach was out of my mouth
Very well done. Poses a situation, the problem, and solution in one quick, fluid go. One of my favourites from TED Ed so far.
I love how much she cared about the virtual fish
3:42 and be hella traumatized
Im a scuba diver....this is an awsom and simple vid describing the effects of pressure on living organismes. I know divers from all over the world. none of them have any prob with the units of measure. they are common enough to be understandable everyplace. thanx TED.
here after the missing titanic submarine
Trying to figure out what the titanic tourists could've been feeling down there.
They felt nothing because they were inside the submersible with same pressure as the surface water. Only the submersible felt the tremendous pressure of deep depth and imploded when a weak point gave in.
Great effort and excellently explained, Thanks!
For those using other units:
14.7 psi = 1.01 bar = 1 atm = 760 mmHg
33 ft = 10 m
Whose here after they found out Titan Tianic imploded.
Me
Whose here after the Submarine/Titanic situation?
In the middle of my dive certification course rn so this is very helpful
How many ppl end up here after Oceangate accident?
Why not use kg and Pa and other International System units so the people outside the US could understand the video?
True. I hate how the USA changes words or meanings of them for no apparent reason like soccer or color or canceled
B. Hafa >the USA CHANGES words or meanings of them
Lol. You just don't know how a language work. You can't delibately change a word. It happens independent of an individual, but because humans aren't perfect and the language is transfered through generations with little changes. The language changes, it's inevitable. Also it's normal if the language has regional variants. 'Cause we're all different.
And if you change the spelling of the word, you don't change the actual word at all. I can spell the word "fish" like "feesh", "pheashe", or even "ghoti" (google "ghoti"), but it doesn't change its pronuncation, usage and meaning at all.
Yeah but I feel like USA is trying to be special by being the only country to use soccer instead of football. See?
B. Hafa No. They call it soccer, because they're used to.
I'm Australian and I understood it just fine, also they had annotations changing the values to metric at times
Excellent explanation! thanks
Why the hell are you fishing so deep?
***** lmao
Marcel Rows Why you care about what he does so much?
Ashock
You never played club penguin?
Fish are like “god DAMN how far down do I have to go to get away from these assholes”
Oceangate implosion brought me here
That is one story with a happy ending. I like it.
Picasso
I'm most concerned with how calm her voice was while saying the line "with its stomach sticking out of its mouth"
Titan submersible search and rescue brought me here 😥😥😥🙏🏾
Poor fish :(
Oh shut up.
@@thepencilcunts Oh shut up.
@@outlanderwraith oh shut up
@@thepencilcunts oh shut up
@@outlanderwraith oh shut up
love the animations
How does the fish survive after throwing up its stomach ?¿?
very nice explained
Really enjoyed that
Thank you
great video
wow thank u for this
Ended up here searching the titan
is this where Radiohead got the idea for their The Bends album?
Informative.
but do I have to give the fish breaks upon lowering it to 1800ft?
The animators at @3:13 - "You want us to do what???"
I will never understand catch and release fishing. Eat it or don’t fish at all.
Ain’t nobody puttin fish back on the hook and lowering it back into the ocean, 😂
enhancing my knowledge
Does the volume of water affects pressure in diving deep? for example a 5x5 pool which is 100m deep with 1k gallons of sea water vs 100m deep ocean with tons of seawater. Will it influence pressure? Why Or why not?
Pressure = Force x area, force = weight = mass x gravitational strength, area = vol / height, vol = mass / density.
applying all this gives pressure = height (depth) x density of fluid x gravitational field strength. volume isn't necessary for pressure :)
Great explaination. But why catch a fish if your not going to eat it?
seriously? that is how you want to explain it? 14.7 psi per 33 ft? as if imperial units weren't odd eough?
1 atmosphere of pressure per 10m
Nick Conforti now tell me that Metric units arent superior....a simple 1 per 10 instead of 14.7/33
That Guy I suppose that the actual calculation was made in SI units, but then transfered to the Imperial ones.
That Guy metric units aren't superior.
They're bleedin' French!
The Cake is not a Vlog In a different comment you called it Britsh.
PSI... feet... polar bear... quarter... Oh I love this channel! LOL!
Saying "Under the sea, pressure increases by 1 ATM for every 10 metre in depth." heard much simpler and understandable isn't it?
Great video anyway!
I love diving.💜💜💜 I miss diving because
I have been two months without diving😖😔
u r superbbb
How long can the fish survive at the surface in the decompressed state without dying?
I wNt to point out that at no point in this video did they ever condemn sport fishing. I find that refreshing. Thanks TED
How many bananas is a psi?
GLowMt I believe it's approximately 8 Teemos.
Cat the Turtle No its 45.6 dinoflagelates
Yes.
I’m here cuz of the titan
Same
same
cool video but my main question was WHY does going deeper cause more pressure?
is it the weight of the water? or difference in gravity? or some sort of chemical that gets more potent at deeper levels????
It is because of the increased weight of the water above you as you go deeper, the weight of this water is the force acting on the area of your body. As pressure is force per unit area, this explains how the pressure increases as the force (weight of water in this case) increases
so would diving 1,000 ft into the ocean be the same as going 1,000 feet down a water filled tube shaped just like your body?
Exactly, the equation used to calculate the force of the water is: F = density*height of water*acceleration due to gravity, this is then multiplied by the surface area of your body which remains constant. So the only variable is the height of water above you
hmmm, thats really interesting. because i feel like the water can hold itself up.also it is a fluid and thus 1 part is connected to the rest. so how can 1 square inch of water push down on 1 square inch of skin. because if I go into a bath tub im fine, but on the same coin, if i swim to the bottom of a 14 foot pool i feel my ears/head cracking.
i'm not saying i don't believe you, but i'm having trouble wrapping my mind around that concept. checked out ur channel by the way. I know you're not messing with my head haha, thanks for any info
Can someone please translate the USA measurement for me
I would love it if Ted Ed can create another animated video about if it is possible for humans to dive to the deepest point of the ocean and I hope they would include a scene where in year 1979, Sylvia Earle, while wearing a JIM armored atmospheric diving suit, dives to 1,250 ft untethered .
Here because of titan sub. Hope everything turns out well. 🙏
It didn't
Under the sea,
Under the sea,
Down here the pressure,
Darling, it's better
Take it from me~
We are what landfolk loves to cook
But we're inflated once off the hook.
Darling it's better,
Here with high pressure,
Keeps you at leisure, yet unexploded
And not too bloated
Take it from me~
Pressure water heat and many more way more than we can imagine till we get into it huge ocean rights there
Easier to remember - 1bar every 10m.
Im just thinking of the fishes in Mariane trench OMG I wonder how they are looking scary
OH MY GOD, PLEASE KILL THAT FISH! THAT'S SO BAD!
It's a little bit funny though to see
The animation looks like the game "ridiculous fishing" my favorite game
Hello World Hhaha I played it too, I like when you toss the fish out of space x'D
I don't know why people are complaining. It's a good video.
Such a nice ending :)
That was an unexpected beginning
Good stuff. Radiohead-The Bends. No,but seriously, Thank You.
Great video! Under 250 club!
perfect..thanks alot
Give a like if you played Tomb Raider 2 as a kid, had no idea what water pressure is, and thought it was awesome when Lara Croft swam to the bottom of the ocean 👍
We know that and why then are we not using it as a technology or energy force?
What happens if you keep decreasing pressure of water does it turn into airr. What is the least pressure water can be
if you keep decreasing the pressure acting on water it then it would eventually vaporise, the pressure at which this happens depends upon the temperature of the water.
I watch these to fall asleep
where I studied we used S.I units so this is really confusing me
I don't get it. If I'm 40ft underwater, what kind of pressure will I have on me? What do I compare it to?
you'd feel some amount of pressure in your ears, because eardrums are sensitive to pressure changes (but there are easy ways to fix that), and you probably wouldn't really feel anything more than that. if you had a balloon with you on the surface and took it down with you, it'd be less than half its original size, but our bodies aren't that soft, we've got bones and all, so you'd be fine. it'd be a little more than experiencing the equivalent of the pressure of two atmospheres on you, rather than the 1 we feel on the surface, since 30ish feet of water basically cause as much pressure as our whole atmosphere.
Poor fish :/
3:09 YEET!!!!😂😂😂😂😂
It'll be funny if the fish got eaten immediately when it was released back into the water
fish will live to see another day? good april fools' day joke! you never see any sunlight on the depth of 500 meters
heavy enough to squeeze rock to lava cant freeze under pressure, magic stuff
polar bears are white no brown
I wonder what happens if a submarine implodes underwater
This fish lives at 55 bars of pressure, when you bring it outof the water it's suddenly only at 1 bar of pressure, a difference of 54 Bars. It's eyes bulge etc, yet it doesn't explode.
When a human is exposed to the vaccuum of space, it's a drop from 1 bar of pressure to 0 bar of pressure, a difference of only 1 bar. Compare that to the immense 54 bars difference that the fish goes through. This is why a human exposed to the vaccuum of space does not explode, it's just not enough of a pressure difference. Humans exploding in space is just a myth.
Could we slowly decompress to 0 bar?
Yeah there aren't really anywhere for the gas to get trapped. You'd likely die of hypoxia or the cold before you'd worry about the pressure difference.
@@GhilleGhille you can do it fast, just keep exhaling. The "open" fluids would start to bubble and since you exhale oxygen form your blood you'd blackout in a matter of seconds. However, if you're put in normal air again you might just be fine again. Happened to a NASA employee once.
bạn dịch ng VN dịch sai chỗ định luật Henry rồi. '.....dissolves in a liquid' trans ra là hòa tan trong một chất lỏng chứ sao lại dịch ra là không tan trong một chất lỏng?
Why would a fisherman fish a fish only to let it go back?
can u repost the video just involving some more detail and the S.I units please
If you're going to make an educational video that will be seen all over the world, you should probably be using the international base unit system.
Alexandros Kenich no
Alexandros Kenich yes
what is there besides the generaly understood metric and imperial? (i.e. meters and feet).
Now you can be educated on how to use imperial system.
Wipe your tears
What kind of fisherman is he? A rogue genius scientist?
Or simply DON'T fish the fish! Just leave them alone …
中文（简体）chinese screen share，made by myself, for a basic view.
======================================
1
00:00:07.049 -->00:00:10.164
有时你会看到，当一条鱼被卷到水面时
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00:00:10.164 -->00:00:12.160
它会出现膨胀，
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00:00:12.160 -->00:00:14.222
它的眼睛会鼓出眼眶
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00:00:14.222 -->00:00:16.622
它的胃会
伸出它的嘴，
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00:00:16.622 -->00:00:19.289
仿佛被吹成一个气球。
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00:00:19.289 -->00:00:22.893
这种类型的身体变化是由水压的迅速变化引起的。
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00:00:22.893 -->00:00:25.433
被称为气压伤。
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在海面下，每平方英寸上的压力增大14.7磅，
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00:00:30.350 -->00:00:33.848
每下潜33英尺。
10
00:00:33.848 -->00:00:35.750
因此，对于黄眼石斑鱼，
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00:00:35.750 -->00:00:38.926
它可以活在深1800英尺，
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00:00:38.926 -->00:00:43.423
那里每平方英寸上有超过800磅的压力。
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00:00:43.423 -->00:00:47.854
这相当于北极熊体重的四分之一。
14
00:00:47.854 -->00:00:50.106
现在，玻意耳气体定律告诉我们
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00:00:50.106 -->00:00:54.416
该气体的体积反比于压力。
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00:00:54.416 -->00:00:58.366
所以，任何空气填充的空间，像石斑鱼的鱼鳔，
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或人体肺部，
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在他们下降更深时压缩，
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00:01:02.469 -->00:01:05.077
在他们提升时膨胀。
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00:01:05.077 -->00:01:09.377
后一条鱼咬了渔夫的鱼钩并迅速升到水表，
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鱼鳔中的空气开始膨胀。
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00:01:12.980 -->00:01:17.412
它的快速扩张把鱼的肚子顶出鱼嘴，
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而增加的内压把它的眼睛退出来，
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这种情况称为眼球突出。
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有时石斑鱼的眼睛会甚至有结晶外观
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因为角膜气肿，
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角膜内会出现很多小气泡。
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00:01:35.567 -->00:01:40.505
值得庆幸的是，潜水员不需要为一个封闭的鱼鳔担心。
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潜水员可调节她的肺部压力，通过呼吸上升，
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但必须警惕水下的其他物理定律，
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亨利定律表明溶解在液体中的气体的
32
00:01:53.429 -->00:01:56.635
是正比于它的分压。
33
00:01:56.635 -->00:02:00.720
潜水员呼吸的空气是78％氮气。
34
00:02:00.720 -->00:02:02.521
在海下有更高的压力，
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从空气中潜水罐中的氮气
36
00:02:04.957 -->00:02:10.907
浓度会比在陆地上扩散到潜水员的组织中更大。
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如果潜水员上升过快，
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溶解的氮会从溶液中释放。
39
00:02:16.434 -->00:02:20.326
在她的组织、血液和关节中形成的微泡，
40
00:02:20.326 -->00:02:24.491
导致减压病，又名潜水员病。
41
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这类似
二氧化碳气泡从你的汽水里冒出来。
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00:02:28.921 -->00:02:32.172
当压力减小，
溶液里会冒出的气体。
43
00:02:32.172 -->00:02:34.872
但对于一个潜水员，气泡
引起剧烈疼痛
44
00:02:34.872 -->00:02:37.184
有时甚至死亡。
45
00:02:37.184 -->00:02:40.519
为幸免于潜水员病，潜水员缓慢上升
46
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并沿途休息片刻，
即所谓的减压站，
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00:02:45.311 -->00:02:48.296
因此气体有时间从自己的组织里扩散
48
00:02:48.296 -->00:02:51.026
并通过他们的呼吸被释放。
49
00:02:51.026 -->00:02:53.022
正如一名潜水员需要减压，
50
00:02:53.022 -->00:02:56.427
对于鱼，它需要再压缩，
51
00:02:56.427 -->00:02:59.509
这可以通过把它放回了大海实现。
52
00:02:59.509 -->00:03:02.982
但是，这并不意味着鱼应该往船外扔。
53
00:03:02.982 -->00:03:04.809
充气的身体会浮在水上
54
00:03:04.809 -->00:03:09.196
并被饥饿的海狮吃掉或者海鸥啄食。
55
00:03:09.196 -->00:03:10.495
有一个通俗的故事
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00:03:10.495 -->00:03:14.384
即刺穿它的肚子用针将让空气逸出，
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让鱼自己游回去。
58
00:03:17.023 -->00:03:19.910
但是，它现在是一只气球，不应被弄破。
59
00:03:19.910 -->00:03:22.449
要让鱼返回到正确的栖息地，
60
00:03:22.449 -->00:03:25.213
渔民可以使用下沉设备，
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00:03:25.213 -->00:03:29.902
用钓鱼线把它降到正确的深度。
62
00:03:29.902 -->00:03:32.922
当它回到家园并且被再压缩，鱼鳔的体积减小，
63
00:03:32.922 -->00:03:35.652
它的眼睛可以返回眼眶，
64
00:03:35.652 -->00:03:38.965
它的胃可以回到原位。
65
00:03:38.965 -->00:03:41.153
这条鱼会活着看到第二天，
66
00:03:41.153 -->00:03:46.926
再次的自由的游泳，觅食，繁衍。
Here because of Titan submersible
11CU?
Normally when fishing you keep the fish and cook it.
Here after Submarine incident 2023
Why help the fish to recover, when you caught it to kill and eat it in the first place?
Today I read a letter that Virginia Woolf wrote in 1912, days after the Titanic sank, from which I quote: "it’s a fact that ships don’t sink at that depth, but remain poised half way down, and become perfectly flat. So that Mrs. Stead is now like a pancake, and her eyes like copper coins". Now I'm desperately trying to find out if indeed pressure would do that to a body trapped inside, say, a ship, halfway the bottom of an ocean.
i really don't think it'd make a person's body look like a pancake. bones don't become flattened like that at those pressures. also, the titanic did sink to the bottom of the sea, we know the wreck is on the sea floor, and even the deep sea doesn't have high enough pressures to flatten a whole ship made out of metal and stuff like that, not even close. i have no idea about what someone's eyes would look like at that depth, but i'm guessing they wouldn't last very long anyway.
Ooooor you could not bother returning the fish and eat it instead. Yum.
Or you can just not harm others when you don't even need it for survival!
I’m confused.
1. Why would Nitrogen dissolve more as you get lower, the water pressure isn’t forcing nitrogen molecules into the blood solution. Because your blood vessels don’t compress under all that pressure...?
2. Why can’t you just breathe out the nitrogen bubbles once they form in your blood?
1. as far as i know, it's because the air inside your cylinder has to be at a certain pressure so it's able to come out of the cylinder despite the pressure of the water around it, so that air is at a pressure. and more gases are able to dissolve in liquids when those gases are in higher pressures, that's just how gases work.
2. the human body can't really deal with bubbles in that way. the oxygen and CO2 we breathe in and out is not being transported in our blood in the form of bubbles (as far as i know, at least), so it's just not a thing our bodies are capable of doing.
studying reasons behind oceangate sub
Nothing worse than air exscaping.
👏🏻👏🏻👏🏻👏🏻👏🏻
please... use metric such as kPa, MPa, or Bar related unit
Hmm, i wonder how Percy Jackson deals with this. One, two, three, POSEIDON!!!!!
Eyes that pop out their head......... Steve