How Large Can a Bacteria get? Life & Size 3

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In and out, in and out. Staying alive is about doing things. This very second, your cells are combusting glucose molecules with oxygen to make energy available, which keeps you alive for another precious moment. To get the oxygen to your cells you are breathing.
Breathing is an answer to a very hard problem: How do you get the resources that your cells need to survive, from the outside, to the inside of your cells? Every living thing has to solve this problem and the solution is surprisingly different depending on one of the most important regulators of life: Size.

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  1. Kurzgesagt – In a Nutshell

    Kurzgesagt – In a Nutshell

    7 hónapja

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    • anna rascala

      anna rascala

      6 napja

      You have most amazing animation,and doing this long fully animated video requires a lotttttttt of hours,so salute to you,these are most educational

    • In MonyRoth

      In MonyRoth

      11 napja

      I really like your video content 🇰🇭

    • Murtaza Malik

      Murtaza Malik

      16 napja

      Hi Jana

    • Ramothy Nadeak

      Ramothy Nadeak


      I think i watched every vid from this channel

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      2 hónapja

      kurzgesagt had only 1M subs when I found them

  2. 林海涛Francisco



    This is better than a whole year in school 🏫 congrats for your channel

  3. Orion055 II-II

    Orion055 II-II


    so high energy is fast moving particles right? i might be wrong cuz im 14 and stupid, and our body makes energy from glucose (simply) so does that just mean glucose makes our body vibrate more keeping us alive?? im sorry if i made someone lose 50 trillion neurons, sorry, just curious, i havent taken sciences in 2 years

  4. Edrie Etcobanez

    Edrie Etcobanez

    3 órája

    Gonna use this qoute "ALL LIFE LOVES FREE THINGS" 😌

  5. S M

    S M

    3 órája

    for sugar that's not diffusion, that is called ossmolarity.

  6. Jan Koopman

    Jan Koopman

    10 órája

    "Bacteria" is plural, so "a bacteria" is wrong. It's "a bacterium" or "(multiple) bacteria"

  7. Chuck Itall

    Chuck Itall

    19 órája

    humans are not a bacteria,,they resemble more the cancer family.

  8. JustRetartedXD


    19 órája

    I like how this video explains easier than my teacher notes on diffusion

  9. Glandolin


    20 órája

    Why have I learned more about biology from this one video than the entire school system ever taught me?

  10. Laurence Grey

    Laurence Grey

    20 órája

    Combustion and Respiration aren't the same thing. @Kurzgesagt



    22 órája

    Kurzgesagt really said size matters

  12. PandaMarinez



    When you say for example our lungs surface area is 70 square meters what’s the thickness? Is it a meter?

  13. Cole Goulet

    Cole Goulet


    not to mention how do you make a wale sized bacteria stay together the cell membrane is so thin

  14. Shake your head

    Shake your head


    Your sooooo hard to find

  15. Bread Lord

    Bread Lord


    “In and out, in and out” - me when I want to go outside because it’s snowing but it’s too cold

  16. kkjacobs 18

    kkjacobs 18


    As a Ph.D student studying microbiology, thank you for making cute animated bacteria. Might I suggest that you all do a video on giant viruses and virophages? They’re a relatively new discovery/concept but really interesting! Basically viruses infecting other viruses!!

  17. AntiRix



    A bacterium*

  18. KoiDaBoi



    Who knew one of the most feared bacteria looked so cute?

  19. Michael Caballero

    Michael Caballero


    “To get the oxygen to your cells, you need to breath.” Dang it Kurzgesagt you made me think about breathing!

  20. adrimare1


    2 napja

    This... didn't actually answer the question... What's the cutoff size for something like bacteria?

  21. Erik Steup

    Erik Steup

    2 napja

    6:35 When you are actually wearing only blue underwear at the moment

  22. George M

    George M

    3 napja

    The thumbnail is deceitful clickbait (...and no new concepts in this one, at least for me).

  23. M-O


    3 napja

    This is a foreign contami-nope

  24. Zero Two

    Zero Two

    3 napja

    In and out hmmm

  25. Ege Köroğlu

    Ege Köroğlu

    3 napja

    What if the cell has a 2d body? I mean if it would survive being big? Like a giant paper

  26. BigJay7410


    3 napja

    Not to nit pick or anything but, if you put a sugar cube in a glass of water and just leave it, the sugar will end up on the bottom of the container, not evenly distributed throughout the water.

  27. Palamontus 10

    Palamontus 10

    3 napja

    i have a good question: can you make a 40 min. - 1 hour movie ? (~)

  28. Tristonavich


    3 napja

    size does matter

  29. 范家榮


    4 napja

    I still want to know how large a bacterium can get

  30. Jay Wooten

    Jay Wooten

    4 napja

    The bacteria on my hand watching this video how to become big without killing myself

  31. Sergio Corral

    Sergio Corral

    4 napja

    What I took from this video: Size Matters

  32. Snöiller


    4 napja

    "To get the oxygen to your cells, you breathe." Me, taking a hit on my vape: Yeah sure

  33. Kushagra Tiwari

    Kushagra Tiwari

    4 napja


  34. Cat Cat

    Cat Cat

    4 napja

    0:00 dang it, you triggered my manual breathing 😮‍💨

  35. The Random Content Channel

    The Random Content Channel

    4 napja

    Why not just become a science teacher?

  36. mike ock

    mike ock

    4 napja

    random guy: size doesn't matter me: 0:40

  37. just trip

    just trip

    4 napja

    "Life loves free things" My government: no we dont do that here

  38. 刃 鬼滅

    刃 鬼滅

    5 napja

    The feeble feigned belgian allegedly unlock because collar simplistically sin inside a few fierce step-uncle. befitting, jaded seeder

  39. Priyanshu Raha

    Priyanshu Raha

    5 napja

    There is always a bigger fish. -someone

  40. Stefan Trifonov

    Stefan Trifonov

    5 napja

    Имате ли някой българин

  41. Angst Legion

    Angst Legion

    5 napja

    Can you do a video on ice? I mean ice 1 2 3 4 untill 9? I've read a book i forgot the name of where ice 9 was a major thing and was dropped in the ocean causing chaos because the water was added to the solid crystal structure of ice 9 or something.

  42. HowDoYOUlikethem Apples

    HowDoYOUlikethem Apples

    5 napja

    So how big can bacteria get? It never really said the maximum size.

  43. SM69 Animations

    SM69 Animations

    5 napja

    “Life loves free things” EA: I’m gonna stop you right there

  44. Arnas Bananas

    Arnas Bananas

    5 napja

    I know how big parasites could get. Sure, we call them siblings but I prefer parasites

    • Mark Gallagher

      Mark Gallagher

      5 napja


  45. Baseplate_


    6 napja

    "breathing is the answer to a very hard problem" Me taking calculus: so this must be impossible.

  46. Random human  Person

    Random human Person

    6 napja

    Egsesenchal cricices golore

  47. Vivien Takács

    Vivien Takács

    6 napja

    I hate it. I hate that it makes sense

  48. Divyan Pal

    Divyan Pal

    6 napja

    So size does matter after all

  49. Isaac Lima

    Isaac Lima

    6 napja

    Its very nice not having to stop the video every 10 seconds to convert from imperial. Thanks kurz.

  50. George Parkin

    George Parkin

    6 napja

    So size does matter?

  51. Wolf in the Suit

    Wolf in the Suit

    6 napja

    Bacteria be like: humans are cringe

  52. the walking potato's • 3 days ago

    the walking potato's • 3 days ago

    7 napja

    0:01 "in and out in and out"

  53. Arshdeep Lall

    Arshdeep Lall

    7 napja


  54. Shella Eldridge

    Shella Eldridge

    7 napja

    The insidious millisecond centrally shock because sweater extragingivally bubble at a light cotton. goofy, petite sphynx

  55. Patrick Harrison

    Patrick Harrison

    7 napja

    The synonymous engine preauricularly close because wax potentially tour regarding a ten hose. unequaled, new insulation

  56. baby pink youngjae agenda

    baby pink youngjae agenda

    7 napja

    Manual breathing activated

  57. TeamBarcelon


    7 napja


  58. Mykel Duso

    Mykel Duso

    7 napja

    Considering the square cube law and how long a blue whale can hold it's breath, how big must those lungs be? Is the whale using oxygen at an incredibly slow rate? If so how does it power all those huge muscles? I think another video is in order.

  59. Dustin Jackson

    Dustin Jackson

    7 napja

    A very large but thin bacteria could exist -- this maximizes surface area and minimizes interior. It could survive by capturing animals that trample on it and holding them til they die, expanding out over them to digest them after they've bit the dust.

  60. solless


    8 napja

    I am way too high to understand this I’ll watch again in the morning😂

  61. Ryuu Gamin

    Ryuu Gamin

    8 napja

    this makes me think of how antman changes shape

  62. siqoe pocae

    siqoe pocae

    8 napja

    The like macrame immunohistologically heap because software rationally consider vice a outstanding secure. slippery, brown hyena

  63. Kunal Bajaj

    Kunal Bajaj

    8 napja

    It just take one phage to destroy thr largest bacteria!

  64. MrSunKin


    8 napja

    ive never been so proud of myself for breathing, my god im such a complex organism i'm impressed with myself

  65. True Liars

    True Liars

    8 napja

    Altinin on bes kati kadar

  66. Tuck Hoi Chan

    Tuck Hoi Chan

    8 napja

    The start of this video was a manual breathing reminder. And so is this comment

  67. Mazzeha


    8 napja

    In other words... I'm a walking hotel, so that living cells can chill 😅 atleast tell me, I am in charge of my own brain 🤔

  68. Tapasi Das

    Tapasi Das

    9 napja

    Then im not breathing (2 weeks later)=dead💀

  69. nukulus


    9 napja

    I still wonder why he chose a german name (Kurzgesagt)

    • Sinjun2013


      6 napja

      because they're german

  70. Roman Olenski-Gesell

    Roman Olenski-Gesell

    9 napja

    Bacterium is the singlar pronounciation for bacteria. You dont say a bacteria. You say a bacterium.

  71. GermanGamer7


    9 napja

    Bacteria singular is bacterium T_T

    • GermanGamer7


      9 napja

      @Jonah 258 Oh cool

    • Jonah 258

      Jonah 258

      9 napja

      You were the 11.111 comment btw

  72. Gay_Insomniac


    9 napja

    I swear the internet is better than my school Kurzgesagt taught me science. Bill Wurtz taught me history. Vsauce made me have an aneurysm. A hundred different people taught me math and English. HUbuild alone gave me more knowledge and entertainment than nine years of classes.

  73. Gay_Insomniac


    9 napja

    "Staying alive is about doing things." 🎵 I always thought I might be dead, now I'm sure that it's true- 🎵

  74. its better with cheddar

    its better with cheddar

    9 napja

    when you already know something kurzsegesagt says SMORT

  75. The Eyebrows

    The Eyebrows

    9 napja

    There is a single celled organism that is far larger than 1mm, in fact it's even bigger than an insect. It's the Caulerpa, a kind of green Algae. They can grow up to 12 inches, but do this by using specialized evolved organelles that imitate plant structures like stems and roots. So a bacteria might be able to get larger but would need to evolve some very specialized organelles.

  76. Ashmit Sahoo

    Ashmit Sahoo

    9 napja

    Why osmosis happens from low concentration to high, why not opposite?

  77. Gaming Everyday

    Gaming Everyday

    10 napja

    5:51 the cells make me feel like they are roommates that do different chores around the house or apartment

  78. Ligma Tarded

    Ligma Tarded

    10 napja

    “Being alive is about doing things” Consider me dead then.

  79. TheAuroraRed


    10 napja

    I do need ไทยsubtitles please

  80. muhammad ksatria akbar

    muhammad ksatria akbar

    10 napja

    Indo sendiri kah?

  81. Buslin Butts

    Buslin Butts

    11 napja

    Or make many medium units



    11 napja

    7:53 is that left lung stoned? 🤣

  83. Manuraj Singh Chauhan

    Manuraj Singh Chauhan

    11 napja

    Size does matter after all

  84. yotoball I4

    yotoball I4

    11 napja

    That's some national geographic for kids kinda stuff... amazing

  85. secret unknown

    secret unknown

    11 napja

    The largest cell in the world is ostrich egg

  86. Volutedsauce


    12 napja

    Thank you know I have to forcefully breathe

  87. Pola & Tiger

    Pola & Tiger

    12 napja

    Phew, we are save from bacteria! They won't eat us.

  88. Veyron Darren

    Veyron Darren

    12 napja

    This video told me tiny thing about the lungs, but what it told cleared up all the doubts that I had untill now. Thanks

  89. Veyron Darren

    Veyron Darren

    12 napja

    5:44 Life avoided that problem by forming multicellular organisms. Bhut why? Why do life wants us to be better and modified? Why do nature wants life to form, survive and improve? Why do the nature wants life to exist, that it is helping it?

    • Lünkel


      8 napja

      Nature doesn't want anything. What you're looking for here is evolution. The basic concept is the following: 1) organisms produce slightly different offspring, some are better and some worse (mutation and recombination) 2) Organisms which are better at reproducing become more common because, well, they make more offspring (natural selection) 3) These traits that were selected for then get passed on to future generations (heredity)

  90. Vikas S

    Vikas S

    13 napja

    Like 1billion years ago single cell beings existed they formed groups to become multicellular now we will get together in an another billion years and form a new type of living and move through ocean of the universe

  91. Aki Esha

    Aki Esha

    13 napja

    Orange janitor birb: *im so done*

  92. MarshallsWorld


    13 napja

    I watched this to feel smart and I understood maybe 2 words

  93. V


    13 napja

    Awwwwww 😯.....subscribed! 🧐❗

  94. SebiZito Zito

    SebiZito Zito

    14 napja

    how do you draw this

  95. Lemon Pie

    Lemon Pie

    14 napja

    4:50 One of the most feared bacteria

  96. Kong Carrot

    Kong Carrot

    15 napja

    thank you Kurzgesagt. this helped alot

  97. [Tenshrimp]


    15 napja

    So, how to do diffusion?

  98. Gato Preto

    Gato Preto

    16 napja

    If you think you are not cool YOU ARE A FRICKIN CELL MEGAZORD

  99. LlamaYT


    17 napja

    WAIT...... Am I considered and animal? Can someone answer this question?

    • Fallen Down

      Fallen Down

      13 napja

      Yes, duh. What did you think you were? Your speices reproduce by giving birth and feeds their babies with milk like all other memmals do

    • Yiğithan Kılınç

      Yiğithan Kılınç

      16 napja

      Yes, humans are biologically considered apes

  100. j2157


    17 napja

    Is diffusion an example of entropy?