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- เผยแพร่เมื่อ 17 ส.ค. 2016
- View full lesson: ed.ted.com/lessons/what-is-the...
The elephant is a creature of epic proportions - and yet, it owes its enormity to more than 1,000 trillion microscopic cells. And on the epically small end of things, there are likely millions of unicellular species, yet there are very few we can see with the naked eye. Why is that? Why don’t we get unicellular elephants? Or blue whales? Or brown bears? Murry Gans explains.
Lesson by Murry Gans, animation by Zedem Media.
The mitochondria is the powerhouse of the cell.
My mom is the powerhouse of my house
+iSham2044 because they are both microscopic?
Hold on, i heard this somewhere. Previous Ted-Ed?
Justin Yueh 😂. well, my respect for your mother, iSham2044 😁. mitochondria does no easy work, so does your mother 💪
( ͡͡ ° ͜ ʖ ͡ °) So it's the mightychondria.
We interrupt "What is the biggest cell" to bring you "Why cells are small"
张三 yes I'm looking for biggest cell possible
I guess even he didn't know the answer
@@marksmithwas12 Its Valonia ventricosa if you are curious
Spot on.
Mathew Klátil thanccc
How is it that you always seem to publish exactly what I need for my classroom days/hours before I need them?!? You are fantastic! Keep up the great work!
Wait, isn't 1,000 trillion a quadrillion or something
yes
Lazertazer Why didn't they say that then lol
ItsTangy
Because most people have heard the word "trillion", but if you say "quadrillion", many people will think it's a made up word.
Lazertazer True but they could have said 1,000 trillion or a quadrillion
1,000 trillion sounds bigger than 1 quadrillion, even though it's the same thing.
3:00 is when the real topic begins.....and sadly ends too🙁
What do you mean "sadly"?!? This entire video was incredibly helpful and interesting!
@@Empenguin
I agree!
@@strange_and_magnificent thats because the topic changes. and we dont get to know more about the original topic
We have a neuron that stretches from the spine to the foot??
I believe it...that would explain why I suck at soccer
David S. obviously
Super Noodles. Motor neuron bodies in the spinal cord extend axons directly out to distal skeletal muscle. Some neurons of the sciatic nerve extend all the way down the leg. Don't confuse the man. en.wikipedia.org/wiki/Alpha_motor_neuron?wprov=sfla1
We have many, see above.
shut up
I love the narrators voice!! Sometimes I listen to him before going to bed so I can fall asleep faster, it really works!!
Ya it makes me sleepy lol
Me too!
True
That's Addison Anderson. One of my favorite narrators and voice talents.
I thought I was the only one.
As for that bit about the surface area and volume of a cell, I’ve heard it called the square/cube law; basically, an object’s surface area scales with the square of its length, but the volume scales with its cube, so the latter increases more when an object is scaled up. Just thought they could have explained that better.
Interesting! So the limit to the size of a cell is essentially a trade-off between it's sustenance and waste excretion! 🙂
The mitochondria is the powerhouse of the cell
True
False. Debate me.
+Combinemon ooops i replied to the wrong comment
It uses gluecose (sugar) and other charbs to produses ATP which is a molicule which can esaly be comined to produse energy.
According to who exactly? You'll need some scientific proof on that.
There are actually some rather large single celled protozoa dwelling on the Abyssal Plain. Apparently the environment down there is stable (and hostile) enough to allow such fragile creatures to survive.
Finding out that I have a metre long neutron running down my leg kind freaks me out. Oh fuck, I just realised, there's one in the other leg too
What about the pseudoplasmodium of coenocytic slime mold? The aggregate form has a single cell wall, and it's capable of basic learning about it's environment (remembering, somehow, interval conditions as an example) and while these usually don't get very big, they can, and they can also subdivide back into separate smaller units.
I’m lost the moment he calculated the cube 😂
0:10 metric system..., please, please use it.
or you can learn imperial and enjoy knowing both instead of just one
The hole wolrd uses the metric system. It's just the USA which lives in the past.
TheJaseku "just the USA"
that' surprisingly untrue, but it also doesn't matter in the slightest, knowing more than just one system of measurement is objectively better than sticking to only one because "muh everyone else does it"
+TheJaseku The United States, Liberia, and Myanmar (Burma) don't use the metric system.
So almost nobody.
Fun fact, MurryGans are also the heaviest multi-celled organisms
3:07 for the answer
Fascinating how it convergently evolved fronds like a fern to increase surface area
Why is it that Ted-Ed always ends their videos with some of the most beautiful sentences ever.
Another aspect you didn’t mention is the radical difference in how things move in the microscopic and macroscopic world’s (I think there’d a Ted-Ed about Reynolds numbers, great additional material); the way animals like the elephants and grizzly bears you mentioned eat and move and reproduce involves a whole mess of rigid skeletons and muscles and specialized cells that likely would be impossible for a unicellular creature to mimic, while a cell’s tricks with microtubule “skeletons” and flagellae would not work at macroscopic scales.
Thanks my class had to take notes on this and your voice is very clear so I can hear everything and take notes down. :)
I've been looking for a video like this! thanks TED-Ed
Short answer: It's Kirby.
What is the biggest organism only with a single nuclei?
An ostrich egg?
My guess is an ostrich egg, since all eggs are single celled
But an egg isn't an organism, more like a disposable womb.
The embryo is the only living part.
So it isn't seen as an organism until it hatches?
Claes Henriksson No, the embryo inside is live and grows from the "dead" yolk.
Loved the cell illustration and animation.
Now that I know how incredibly thin and delicate my spine to leg nerve cell is, I feel like I’ll be paralyzed any second.
perfect! two cell videos in a row cuz I'm studying it atm.
Wonderful clip.I will be delighted if you upload a clip telling how we think or work even we many different cells?
I remember an experiment we did in science class once to demonstrate the difficulty presented by volume increasing faster than surface area. We cut 2 cubes of some kind of gel, one big and one small, and out them in a colored water solution and left them over night. When we cut them open the next day, the smaller cubes were mostly saturated but the larger ones were not.
This applies to cells because they rely a lot on the passive diffusion of water (osmosis) in order to save energy. It would take a lot of energy to speed up the transfer of chemicals by using a process other than osmosis.
I'm surprised you didn't mention the yolk of an egg as an example of a very large cell.
**Opens the video just to comment "Ostrich egg" and leaves without watching it.**
The animator’s voice is amazing. 👍🏻👍🏻👍🏻
Fantastic explanation!
I love it when he says micrometer xD
Haven't watched the video but can't believe the world's biggest single cell is called Murry
can someone give this man a glass of water? his voice sounds like needs some.
*Bio Exam:* What’s the biggest single cell organism?
*Me when I don’t know the answer:*
I've been asking this question ever since i had knowledge of cells
Caulerpa taxifolia
Anakin Skywalker was full of Micromeders.
You know, you could just say “micron”. It’s the same as a micrometer.
Wake me when you make a mega-elephant make out of thousands of elephants.
Physarum polycephalum, a 'true slime mould', is but one example of a single-celled organism that can easily become 'larger' than 30cm. It can cover up to 1sqm under the right conditions.
2:58 you came for this.
Wait ...
I expected that the slime mold might be the largest single cell. I mean … That is like an giant amoeba!
Phenomenal animation!!!!!!
The reason why there aren't many uni-cellular big organisms is that like it said in the video it doesn't matter if one cell for us gets destroyed (we loose like 37mill everyday) but it will matter for the un-cellular organisms
Would that mean there is a universal volume and surface area limit to every single cell organism using the same math ratio law you stated in the video?
I still have no idea why this Square-cube law exists. If you just measure in larger units, then the cube will always have a 6:1 surface to volume ratio.
Steve Zukley Sure, but the ratio between the two will be in a larger unit as well.
Suppose a "doublemeter" was a name of a unit twice as long as a meter.
The ratio between a cubic doublemeter and 6 square doublemeters, would be 1/6 doublemeters, while the ratio between a cubic meter and 6 square meters would be 1/6 meters, and 1/6 doublemeters is twice as much as 1/6 meters.
Does that make sense?
Because the universe don't want to humans to discover resizing
If x is the side of cube then volume is (x.x.x), total surface is 6.x.x) ratio volume/surface is x/6. The ratio changes as x changes, not constant as 1/6 as you think.
What if the cells crenated and extended outwards?
Would they be able to expand forever?
valonia ventracosa?
Thanks
if there is a huge cell large as the elephant, that would be one punch world
A cell can be large if it's flat. That makes it fragile, though.
There are some algae with cells several feet long.
I always thought Daredevil's Kingpin was the biggest single-celled organism. It's a luxurious cell, too.
How long is a motor neuron from the sacrum to the tip of the fluke of a blue whale?
"what is the biggest single-celled organism?" is now interrupted by "W0W0W0W0W0 ELEPHANTS ARE HUUGEEEE CHECK OUT THE CELLS ON THIS THING W 0 0 0 W"
Elephants, Whales and Bears!
The cell body of a motor neuron is approximately 100 microns (0.1 millimeter) in diameter and as you now know, the axon is about 1 meter (1,000 millimeter) in length. So, the axon of a motor neuron is 10,000 times as long as the cell body is wide.
large organisms could be trees or mushrooms too... ans they can get way heavier than old Bluewhale here.
thanks for the video :)
Last time i was this early, Keemstar had more subs than Scarce
drink ur salf
Wrong channel
Leafyishere? More like leafyisacyberbull- oh wait, wrong channel.. give me some of that bleach
You mispelled Keemcancer
fucking annoying kids
Who expected him to mention the cell theory?😂
0:31 To find out, we have to pee into a cell's guts.
It's peer..
aw I thought bubble algae would be mentioned but still cool.
What about retrovirus?
To compensate for its length it's really thin. that's a shame ;)
He should've mentioned like how large an elephant would be if all of its cells were the size of the largest cell in the world.
2:58 i know its a short video, but i just wanted to know the answer quick. And even then there a few * asterisk about the awnser. :)
Thats a weird way to pronounce micro meter lol
Micrometer can also called micron. I guess the guy basically just combined them into micron meter.
It sounds more like "microm meter"
How do you say 'speedometer' or 'pedometer?'
it's just like thermometer and kilometer. except it's weird to hear someone say micrometer instead of micron.
but slime molds can get even bigger and their just one cell
At first I read it as single-celled organ and thought it must be Donald Trumps brain.
I'm supposed to be studying this for a test but I got lazy and watched this instead. Turns out I'm supposed to be studying the same topic ha
The largest cell is an egg (ostrich egg) 16.5cm (15-18 cm) smallest is cerrebellum’s granude cell 4500 (4.5ym）. (Smallest is expected because I’m saying inside human)
2 things. it is this kind of instantaneous access to info that makes the internet the greatest achievement of all time. (for now) and I suspect that the origin of life had many starts and stops before there was a Universe that was perfect enough to be copied endlessly....,
Question : But what are Tess's initial dimensions ??? ... Since we know the final ones well !!! ... ( Height 5' 4¼" (1,63 m) ) ...
@ 00:30 "Because we don't want to be killed, absorbed, and dissolved by a unicelluar organism!" 😂
My brain. It only has 1 cell
So, you didn't answer the question... That plant still has more than one nucleus. Acetabularia has one nucleus, and can reach 10cm.
wouldnt a fertilised ostrich egg before the first division be the largest single cell organism?
sorry for the bad english, and sorry if this stops the prochoice movement for orstriches.
I look away from this video and found math. I did not know this could happen. I think a few Brian cells ded
What about large eggs, like ostrich eggs? Those are technically huge single cells. They may not be as tall as 30 cm, but I would think they would have more mass.
What is the biggest rock?
You should make a vid on scoliosis
The only thing that i learn to this video is that, elephant is the answer to the title.
you learned wrong, brother
I'm beginning to think these "Jesus" youtube commentors aren't authentic...
Patrick Hodson
oh yeah? i know exactly where you live so dont test me peasant!
buen video
Isn't ostrich egg is the biggest cell
Whatever happened to slime molds? They might not be as "big," but I think they have more volume.
The powerhouse is the mitochondria of the cell 😂
What's the smallest cell in the world?
YOUR MOM
ostrich egg, all eggs are one cell and ostriches have huge eggs, ez
unicelular organisms: bear , elephant and whale rly?
i love this
Its my senior year this year, and I still have no idea what I'm going to do with my life.
What did you decide to do?
What did you do then and what do you do now?
تصحيح الترجمة : اكبر كائن حي أحادي الخلية في العالم 3:09
Translation correction: the largest single-celled organism in the world 3.09
can u plzz make a video about einstein's photoelectric effect !!!
What about the slime mould ?
That elephant part reminded me of brain transplant
No weed for Soto from me. No rides either. No capes.
How does poison kill you
I heard of humans with only one brain cell.