Tiny Bombs in your Blood - The Complement System

  • Published on Jul 28, 2019 veröffentlicht
  • Sources:
    One of the key players of our immune system is the complement system. An army of millions and trillions of tiny bombs, which work together in a complex and elegant dance to stop intruders in your body.
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Comments • 12 441

  • Kurzgesagt – In a Nutshell

    Our Complement System is super complex and fascinating and we can’t get enough of it - so we also made a poster and postcards with its core workings step by step.
    Get it here: shop.kurzgesagt.org

    • hongchuan wang
      hongchuan wang 5 days ago

      Yes... complimenting is kinda hard

    • Jordi Hofmann
      Jordi Hofmann 5 days ago

      I have one question why Dir you have the german word Kurzgesagt in your Channel Name?

    • Drew Durant
      Drew Durant 9 days ago

      Kurzgesagt - In a Nutshell I always end up watching your videos at the end of my trips. Crazy world we live in.

    • steven HK
      steven HK 14 days ago

      Thx really I wait for this for a year, thx for all the efforts you make and keep on!

  • Medo
    Medo 17 hours ago

    I'm a programmer and this is something I'd actually like to turn into a game. Maybe take the concept of the Dyson sphere video and turn that into a game too!

  • Kazuli The Seawing
    Kazuli The Seawing 21 hour ago

    Bite za dusto! Oh no! Its in your eye!

  • milli park
    milli park 22 hours ago

    Can you explain auto immune diseases? thank you.

  • Crusader Of the internet

    2:49 c3 looks like a slightly obese monk flipping off the person behind them

  • Memon Head
    Memon Head 22 hours ago

    i heard a qwak sound

  • Memon Head
    Memon Head 22 hours ago


  • TheDiabeticGameMaster
    TheDiabeticGameMaster 23 hours ago

    This is so fucking insane and complicated that I am in awe at all the scientists who spent entire careers figuring this out for us.

  • bepis boy
    bepis boy 23 hours ago

    Damn... my immune system is ruthless

  • poketdoom
    poketdoom 23 hours ago +1

    Wait bacteria can bleed?

  • Manju Roy
    Manju Roy Day ago

    I want to be your Patron so badly but I don't have money.
    But one day I will

  • 央礼
    央礼 Day ago

    It would be cool to have a video game based on this. Like Call of Duty style where you will play as a protein and you will kill benign cancer cells, etc. There are also bosses and unlockable characters. Imagine learning while enjoying.

  • Eric Xie
    Eric Xie Day ago

    Complements set up camp on bacteria

  • Rocatex
    Rocatex Day ago


  • mathieu petitpas

    when killer queen is inside of you

  • MrAmaceing
    MrAmaceing Day ago

    Mind. Blown. !!!!

  • Mr. Coffee
    Mr. Coffee Day ago +3

    Protein C3b : *This is not even my final form !!*
    Protein C3bBbP: *Now youve made me mad !!*
    Protein C5 Convertase: *HULK SMASH !!!*

  • R- HES
    R- HES Day ago

    A+, again.

  • CaramelLeek
    CaramelLeek Day ago

    This is like 2 chapters worth of material in a grad-school level intro immunology class squeezed into 1 video. Good job!

  • Shawn Lee
    Shawn Lee Day ago

    even im our immune system RNG is still needed

  • Erimad
    Erimad Day ago

    Kirller Qween, bitesdadusto!

  • Semih Fatih Adem

    ''Many mindless things can do smart things together''. Random, mindless things! There is a Designer for sure.

  • Tenuun Javkhlan
    Tenuun Javkhlan 2 days ago +1

    This should be a game

  • JW_Cat
    JW_Cat 2 days ago



    Voice so good

  • Ludricus F.C
    Ludricus F.C 2 days ago

    I will never stop loving this

  • Leon Leon
    Leon Leon 2 days ago

    in short story,war always happens everyday in our body..

  • Chiler Snake
    Chiler Snake 2 days ago


  • Puggy Animator
    Puggy Animator 2 days ago

    So coool, keep it up. Part 3 please!

  • mislic 745
    mislic 745 2 days ago

    4:21 miss opportunity to say "BLOODY STREAM"

  • Francesco De Caro
    Francesco De Caro 2 days ago

    am i the only one who is unable to see the date of release under the video? It only shows the number of subscribers now

  • Santi
    Santi 2 days ago

    we love catalysts

  • Rama Sunmi
    Rama Sunmi 2 days ago

    Please make a video about HIV/AIDS

  • a random guy on the internet

    C3A:*running and screaming*
    my immune system: why are you runnin? why are you runnin?

  • Anankin12
    Anankin12 2 days ago


  • this is great
    this is great 3 days ago

    My immune system is smarter then myself then...

  • Gojifan 9000.
    Gojifan 9000. 3 days ago

    Bacteria: oh no
    Virus: nope nope nope nope nope nope nope nope nope nope nope

  • Crimson
    Crimson 3 days ago +4

    Man this shit is so complicated. Crazy to think such tiny little things means the difference between death and being able to live another day

  • Alekss Freimanis
    Alekss Freimanis 3 days ago

    i wish i could support you, but i'm a little to young.

  • James Bearden
    James Bearden 3 days ago +1

    Anyone notice how the proteins look like amazingly complex machines, and then here comes the Phagocyte looking like an newly awakened eldritch monster?

  • Meidina Kartika Hadi

    this is insanely good

  • Un Chico Random A Random Guy

    Everybody gangsta till proteins become prions

  • End Moraine
    End Moraine 3 days ago

    1:52 Upvote if you just stared at cleavage

  • Marc Lande
    Marc Lande 4 days ago

    How do antibiotics engage infection when the immune response is not enough?

  • Shreyashi Barik
    Shreyashi Barik 4 days ago

    Kurzgesagt: Imagine being covered in flies . Now imagine being covered in flies again. Now imagine them turning into wasps.

  • hacker of medibang
    hacker of medibang 4 days ago

    I got some questions...
    Anyone can answer, dont worry.
    1.- ¿Does all Virus are bigger that cells?
    2.- This looked like only a few Virus were in human body. I dont think so because Virus are so small... ¿the inmune sistem takes more to eliminate them than this video?

  • JJ Supreme
    JJ Supreme 5 days ago


  • ibrainrmhm
    ibrainrmhm 5 days ago


  • InfinityTower
    InfinityTower 5 days ago

    remember the ebola and infection videos?
    the art style has come a long way...

  • Gus' Channel
    Gus' Channel 5 days ago +1

    "many mindless things can do smart things together" "this video was made possible, by... You"

  • CanalDoRayne
    CanalDoRayne 5 days ago

    Obrigado por colocar legendas em português nos vídeos. São muito bons os vídeos!

  • Commonwealth Of Ascension

    I can imagine a Total War type game being made out of this. Imagine the unit shouts? Macrophage Comitatenses!

  • Jar Jar Binks
    Jar Jar Binks 5 days ago

    Good to know there are billions upon billions complements for me. (:

  • Mr. sir
    Mr. sir 5 days ago

    So what I get from this is, bacteria have there own bacteria.

    LEELA SATYAVATHI 5 days ago

    Kurzgesagt:This video was sponsored by you..
    Me: Awwwwwwww..
    Also me: checking whether i gave any money to kurzgesagt..

  • BangtanAbbie FA
    BangtanAbbie FA 5 days ago

    I feel sorry for the bacteria

  • Ninja J
    Ninja J 6 days ago


  • Patrick Mcvey
    Patrick Mcvey 6 days ago

    Encuentro genial este canal, sigan así😍

  • indah zulfida
    indah zulfida 6 days ago

    You like nord kurstgazt

  • Pete Pumpong
    Pete Pumpong 6 days ago

    demon blood art!!! EXPLODING BLOOD!!!!!!!!!!!!!!!!