Tiny Bombs in your Blood - The Complement System

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.
Support us on Patreon so we can make more videos (and get cool stuff in return): www.patreon.com/Kurzgesagt?ty=h
Steady: steadyhq.com/de/kurzgesagt
Merchandise: shop.kurzgesagt.org
Newsletter: eepurl.com/cRUQxz
Facebook: bit.ly/1NB6U5O
Twitter: bit.ly/2DDeT83
Instagram: bit.ly/2DEN7r3
Discord: discord.gg/cB7ycdv
The Voice of Kurzgesagt:
Steve Taylor: voice-pool.com/en/english/
The music of the video here:
Soundcloud: bit.ly/2Y7VEO4
Bandcamp: bit.ly/2Yux1ut
Facebook: bit.ly/2GIoZlH
NLplayer: bit.ly/2CZ6PeN
Hannah & Jonah, Joey Asperger, Benjamin Rister, BaekSoungYeol, Gibok Jung, Tim Meulenbroeks, Chingiz, Chloe Hill, Filip Dabrowski, Ben Palmetshofer, Ludovic Audibert, Guruprasad Kulkarni, Tekant Gündoğan, Sali Morris, roberto vargas, Richard Musiol, Cedric T., Papp Roland, John Issa, Katie, Jonas Svendsen, François Balate, Connor Silva, Daniel, Buck Deerson, Teej, Abel, Harm, Goshia, John Chapman, Andrew Nguyen, Olivia Grubert, Sergei Kukhariev, Skeeh, adc400, Facundo Velasco, Dale agace, Kiran Babla

Help us caption & translate this video!nlplayer.info_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&tab=2


  1. Kurzgesagt – In a Nutshell

    Kurzgesagt – In a Nutshell

    7 maanden geleden

    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

    • Sathi Dey

      Sathi Dey

      2 dagen geleden


    • Sathi Dey

      Sathi Dey

      2 dagen geleden


    • le wang

      le wang

      2 dagen geleden

      wow complex

    • I Smoke Two Joints Before I Smoke Two Joints

      I Smoke Two Joints Before I Smoke Two Joints

      6 dagen geleden

      Should make a video on skin disorders / psoriasis

    • AlphanAkpunar


      12 dagen geleden

      ı'm turkish but ı can't buy your products. please open a turkey store.

  2. sharjeel niazi

    sharjeel niazi

    2 uur geleden

    Luv you guys ❤️❤️❤️😘😘

  3. Jalal Uddin

    Jalal Uddin

    5 uur geleden

    Best crime & thriller movie

  4. PETA


    6 uur geleden

    And the anti biotics are nuclear bombs Yes

  5. emerald nite

    emerald nite

    14 uur geleden

    Imagine having your eyes so far a part



    22 uur geleden

    Kurzgesagt can you do more videos about the immune system

  7. Aryan Ramanand

    Aryan Ramanand

    Dag geleden

    Counter terrorist wins😅

  8. IyzuHatGC 2. Account

    IyzuHatGC 2. Account

    Dag geleden

    Bacteria in the Body: *exist* Complement System: Here's Jonny!

  9. PunchCounter


    Dag geleden

    Who thought this was the virus part of the explained

  10. incredible man

    incredible man

    Dag geleden

    ww3 is happening allready inside us.



    Dag geleden

    This video helps me alot in my studies thanks.

  12. John Mo

    John Mo

    Dag geleden

    When u call 911 in a nutshell

  13. Marvin Matul

    Marvin Matul

    Dag geleden

    Me: Use self destruction

  14. Esmail Pendi

    Esmail Pendi

    2 dagen geleden

    C3a: Awaken my masters

  15. Flare 9288

    Flare 9288

    2 dagen geleden

    Now I know how Killer Queen explodes people

  16. franco ang magnanakae ng puso ko eee

    franco ang magnanakae ng puso ko eee

    2 dagen geleden

    So its like baterio phages but weaker and plentier

  17. Jamison Baker

    Jamison Baker

    2 dagen geleden

    It's only a matter of time before we get protein C3PO

  18. Harlequin Ely

    Harlequin Ely

    2 dagen geleden

    What part of the body creates compliment proteins?

  19. Trevor Mershon

    Trevor Mershon

    3 dagen geleden

    "tiny bombs in your blood" Unwind intensifies

  20. Dulain Karu

    Dulain Karu

    3 dagen geleden

    thank you for being here

  21. Furkan Saraç

    Furkan Saraç

    3 dagen geleden

    I love you Kurzgesagt!

  22. Jeramiah Dabney

    Jeramiah Dabney

    3 dagen geleden

    You're welcome

  23. Rogue BlaxtipOp

    Rogue BlaxtipOp

    3 dagen geleden

    7:11 that some bacteria has an IQ level of 10000 lol

  24. Peter Parker

    Peter Parker

    3 dagen geleden

    C3 be like; I am the match that will light the fire that will burn down the First Or... bacteria, sorry

  25. Xenon Phantom

    Xenon Phantom

    3 dagen geleden

    *Mindless things doing smart things together* Me: but people are smart things doing mindless things together. What a world we live in

  26. Anonymous


    3 dagen geleden

    Can you please explain autoimmune disease? Thanks

  27. Prachaya Mishra

    Prachaya Mishra

    4 dagen geleden

    3:59 I think in works like a battering ram

  28. Lasagna


    4 dagen geleden

    Imagine being covered in flies.

  29. Nether YT

    Nether YT

    4 dagen geleden

    A virus has entered the body in lego city! Hey! Build the cells, Attack the virus

  30. Dudexyzu


    4 dagen geleden

    Immune system 2: electric boogaloo

  31. The T-34

    The T-34

    4 dagen geleden

    "Saturating every fluid in your body" Does that include my ejaculation....

  32. Perro-Enano


    4 dagen geleden

    I love this comment section, it makes me feel smort.

  33. cihan YAVUZ

    cihan YAVUZ

    4 dagen geleden


  34. Isaura Fernandez

    Isaura Fernandez

    5 dagen geleden

    Wow I am subscribing

  35. Rokhilya Gatito

    Rokhilya Gatito

    5 dagen geleden

    Thank you so much for your work!!! I’m so inspired by this Chanel

  36. Random Person

    Random Person

    5 dagen geleden

    Killer queen!

  37. wan iman

    wan iman

    5 dagen geleden

    Ummm how do you buy the merchs

  38. Xenro66


    5 dagen geleden

    Bacteria: Exists Proteins: *So you have chosen death*

  39. ZaniZ


    5 dagen geleden

    if there is anything I've learned in this video, is that whatever scientist got to name the thing "MEMBRANE ATTACK COMPLEX" is definitely not getting paid enough for their job

  40. idk


    5 dagen geleden

    When flies turned into wasps me: o_O

  41. agung rowagus

    agung rowagus

    5 dagen geleden

    0:59 Killer queen has already touched the complement system...

  42. Sadro25


    5 dagen geleden

    We’re you there 7 million years ago? 🤔🙄

  43. Riley Mudkip

    Riley Mudkip

    5 dagen geleden

    These are L e g o

  44. XregularC


    6 dagen geleden

    It saddens me how little recognition is given to videos regarding the micro-world and its seemingly endless marvels. I enjoy your videos about nukes, space, ants, social interactions and more but I prefer these the most, I just wish more people did as well.

  45. Random Memes Weekly

    Random Memes Weekly

    6 dagen geleden

    i ironically understand this more than textbooks

  46. ok im done

    ok im done

    6 dagen geleden

    Microbiome : protein world Me : is the gel-o world

  47. Yu DexTer

    Yu DexTer

    6 dagen geleden

    Mindless thing!!!, however this so called mindless thing is designed for specific purpose with specific function which only able to be successful when working together. This mindless thing is a mind boggling design which human can't even really imagine how this could had happen from the beginning of the universe. This universe is in did a real time witness of a Creator.

  48. Cryoraptor


    6 dagen geleden

    'imagine you're covered in flies again' Eww 'now imagine they become wasps' OH F-

  49. Kim Jai

    Kim Jai

    6 dagen geleden

    transformer 6 :tiny war

  50. Bien Busacay

    Bien Busacay

    7 dagen geleden

    Where do you edit or make your videos. Its so cool

  51. Leehyun (Hayden) Choi

    Leehyun (Hayden) Choi

    7 dagen geleden

    Quaky quack quack got a Baby!

  52. varun


    7 dagen geleden


  53. Lightningamez LXG

    Lightningamez LXG

    7 dagen geleden

    I swear this guys a scientist.

  54. Lion King138

    Lion King138

    7 dagen geleden

    I whould love to see videos like this from all the aspects of immune system. I guess it's way too much work tho

  55. Uncharted Thoughts

    Uncharted Thoughts

    7 dagen geleden

    7:25-> 7:35 low key burn there

  56. Double Oof

    Double Oof

    7 dagen geleden


  57. Quakery Oatsy

    Quakery Oatsy

    7 dagen geleden

    The title be like: "Killer Queen have already touched you"

  58. Charles Wong

    Charles Wong

    7 dagen geleden

    So your tying to say that this things are like timy missiles or C4? Nice

  59. 123 M

    123 M

    7 dagen geleden

    Subhan Allah!

  60. Ma Nam

    Ma Nam

    7 dagen geleden

    1:01 Killer Queen has already touched you