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How Mosquitoes Use Six Needles to Suck Your Blood | Deep Look

October 19, 2019

This is the deadliest animal in the world. Mosquitoes kill hundreds of thousands of people
each year… the most vulnerable people: children, pregnant women… No other bite kills more humans… or makes
more of us sick. So what makes a mosquito’s bite so effective? For starters, they’re motivated. Only females bite us. They need blood to make
eggs… And a pool of water for their babies to hatch in. Even a piece of trash can hold enough. At first glance, it looks simple — this mosquito
digging her proboscis into us. But the tools she’s using here are sophisticated. First, a protective sheath retracts – see
it bending back? If you look at a mosquito’s head under a
microscope, you can see what that sheath protects. And inside *there* are six needles! Two of them have tiny teeth. She uses those to saw through the skin. They’re so sharp you can barely feel her pushing. These other two needles hold the tissues apart while she works. From under the skin, you can see her probing, looking for a blood vessel. Receptors on the tip of one of her other needles pick up on chemicals that our blood vessels exude naturally and guide her to it. Then she uses this same needle like a straw. As her gut fills up, she separates water from the blood and squeezes it out. See that drop? That frees up space to stuff herself with
more nutritious red blood cells. With another needle, she spits chemicals into us. They get our blood flowing more easily, and give us itchy welts afterwards. And sometimes, before she pries herself away, she leaves a parting gift in her saliva: a virus or a parasite that can sicken or kill
us. There’s nothing in it for her. The viruses
and parasites are just hitching a ride. But this is what makes mortal enemies out of us
and mosquitoes. They take our blood. Sometimes we take theirs.
But often, not soon enough. Good. You’re still there. . These are the
larvae of Culex pipiens, a.k.a. the common house mosquito here in California. Gross, right?
Well, you can avoid them by emptying your rain gutters. Pet water dishes too. While
you’re at it, subscribe! We have so many more science videos coming your way. See you next


  • Reply Petey Piptendo September 27, 2019 at 8:28 am

    Just use that type of needles while getting blood drawn for testing. Make that invention, easy.

  • Reply Etienne Irion September 27, 2019 at 7:39 pm

    who sacreficed himself to get malaria just for the sake of a video?

  • Reply Zsazsa LPS September 27, 2019 at 9:32 pm

    Once there was a black widow under my bench, luckily it was a male

  • Reply Monster Kay September 28, 2019 at 2:23 pm

    They are sooooo anoyying

  • Reply Trinical September 28, 2019 at 7:01 pm

    "only females like us"
    is that a compliment?

  • Reply Z. S September 28, 2019 at 7:51 pm

    Fortunately and for some unknown reasons mosquitoes never bite me

  • Reply boostedsil40 September 28, 2019 at 9:15 pm

    They hold the secret to pain free injections why have we not unlocked it?I would LOVE to trade the pain of the needle for the itch of the saliva

  • Reply Roberto Montes September 28, 2019 at 10:00 pm

    “No mosquitos were harmed in the making of this video”

  • Reply arielle September 28, 2019 at 11:32 pm

    Why can’t shots be as unpainful as these

  • Reply LanceDaPsycho September 29, 2019 at 12:17 am

    imagine the world's population of mosquitos in a hot air balloon…then "accidentally" set on fire in the sky.

  • Reply Demyis Birkeneder September 29, 2019 at 1:56 am

    And why arent we working getting these things extinct?

  • Reply the sussage September 29, 2019 at 8:19 am

    Only females suck ?
    Six needles!
    Now I'm creeping out

  • Reply somu. 22 September 29, 2019 at 12:06 pm

    I'm regretting clicking on this video….

  • Reply harrynts September 29, 2019 at 4:40 pm

    In England it just itches

  • Reply Pakistan Zindabad September 29, 2019 at 8:52 pm

    Me enjoying this video while mosquitoes are itching my blood

  • Reply Eliud S.O. September 29, 2019 at 9:29 pm

    I hate em with passion

  • Reply Aaron SilvaJR September 29, 2019 at 11:22 pm

    So to make babies they use my blood so I was a father at 1 year old

  • Reply •xXjosephXx• September 30, 2019 at 1:37 am

    Youtube: your going to watch how mosquitoes suck blood

    Me: okay

  • Reply radha deshmukh September 30, 2019 at 12:09 pm

    watching this while having dengue????this fever and weakness make me fill like living dead body…

  • Reply whylordwhy yeptheysuck September 30, 2019 at 10:04 pm

    I just had a transparent mosquito to land on my arm and it wasnt a new born it was the size of i guess an adult i would say but i cant find anything on it anyone know of this type?

  • Reply BLACKAROT T October 1, 2019 at 12:12 am

    Here is me 3:00 am in the morning looking at mosquitoes videos cuz i got bitted

  • Reply Mac Mcdonald October 1, 2019 at 1:46 pm

    So that is the reason why we have mossquito's to balance the human popullation

  • Reply Mr. Still Chill October 1, 2019 at 10:21 pm

    I killed a aedes aegypti before on a spider

  • Reply sofa October 2, 2019 at 3:21 am


  • Reply Oh, hi there person. October 2, 2019 at 8:31 am

    1:39 How did they get a camera under skin-

  • Reply Im Xinful October 3, 2019 at 1:30 am

    I have EEE

  • Reply Iron Man October 3, 2019 at 7:00 am

    They do have a purpose..

  • Reply HotSizzleTV October 3, 2019 at 7:40 am

    They need to find a way to kill all mosquitoes period.

  • Reply Jazmine C October 3, 2019 at 8:10 am

    I'm a letter carrier and mosquitoes have taken plenty of blood from me recently. I feel so violated and my blood is not even going to a good cause just for her to make more parasites. ? ? Sick.

  • Reply ivan caraig October 3, 2019 at 3:22 pm


  • Reply Mickey Lara October 3, 2019 at 7:48 pm

    You can kill the virus with a hair dryer, the dryer heats up to 140 degrees and it evaporates the toxins and kill the virus. You also get rid of the itch.

  • Reply suzanne Oakes October 4, 2019 at 5:00 am

    I iv had a baby.1

  • Reply Julissa Delgado October 4, 2019 at 12:15 pm

    If you had a chance to kill ond of the worlds most dangerous insects KILL IT DONT LET IT LIVE FOR SCIENCE

  • Reply 조광민 October 4, 2019 at 12:57 pm

    I want kill them

  • Reply AlexGamerTV Roblox October 4, 2019 at 2:48 pm

    I let these women mosquito suck my blood,I have no idea why

  • Reply Omri Waisman October 4, 2019 at 11:50 pm

    My daughter looks at mosquito bite

    Me: I will put something on it

    My daughter: It doesn't hurt of itch but it is a mosquito bite from my dog

    Me puts something on it

    My daughter: Thx dad

  • Reply Omri Waisman October 5, 2019 at 5:31 am

    What happens if all mosquitoes die?

  • Reply Catherine Lopejeu October 5, 2019 at 9:18 am

    Anxiety while watching this?

  • Reply Vimal Chand October 5, 2019 at 12:39 pm

    If human won't be exist sp entrie mosquitoes will disappeared

  • Reply Scrim MK October 5, 2019 at 7:18 pm

    I noticed I had those babies in my bowl of water and it has a plant and I saw them swimming and I threw it in the sink I was like ewwww.

  • Reply heartbeat085 October 5, 2019 at 8:36 pm

    Well…I’m on that part of YouTube again..

  • Reply Can_of_ Shit October 5, 2019 at 9:59 pm

    Petition to kill every mosquito in this planet

  • Reply Crianyde October 6, 2019 at 1:17 am

    When you kill a mosquito and there a lot of blood, it urs.

  • Reply General Gigan And Alfred October 6, 2019 at 11:44 am

    1:45 is that one bobbing her head to the music?

  • Reply General Gigan And Alfred October 6, 2019 at 11:53 am

    You don’t have my respect mosquitoes. And when I’m done none of the mosquitoes will still be alive. I hope no one remembers you.

  • Reply Tereza Felin October 6, 2019 at 5:31 pm

    Does mosquito has biology degree ?

  • Reply Akeem Isaacs October 6, 2019 at 9:12 pm

    2.50 That's my favorite part.

  • Reply trixgamer x October 7, 2019 at 4:29 pm

    I already have patreon xD

  • Reply Jack Krauzers October 7, 2019 at 5:15 pm

    it's good for a forever alone guy because a female will attached for them

  • Reply La xXcOoKiEMochA Xx October 7, 2019 at 11:07 pm

    I get bit by mosquitoes all the time I'm perfectly fine

  • Reply SpudDboy 7 October 8, 2019 at 1:09 am

    I wish I had the infinity gauntlet to snap all mosquitoes away

  • Reply ŁøŁ ŁøŁ October 8, 2019 at 1:30 am

    2:37 :my grades

  • Reply CyberCy October 8, 2019 at 8:12 am

    Filipinos out there: am i a joke to you

  • Reply Daniel de santos October 8, 2019 at 5:32 pm

    Killing it when it sucks my blood gives me the ultimate satisfaction of vengence

  • Reply Jaime Aird October 8, 2019 at 10:05 pm

    Ya thats why they need die

  • Reply Luca Vassallo October 8, 2019 at 11:30 pm

    who else mentally barfed during this. put a like if you did

  • Reply Usmile October 9, 2019 at 1:39 am

    the subject mosquitos took blood from died 2 days later.

  • Reply Abi Branning October 9, 2019 at 11:08 am

    Wait misquitos are born in water?

  • Reply Abi Branning October 9, 2019 at 11:11 am

    Has anyone ever just let a misquito suck your blood?

  • Reply Pxsion X October 9, 2019 at 8:35 pm

    0:53 now I know what are those things swimming in my pool when it gets dirty

  • Reply Karate Blader October 9, 2019 at 9:49 pm

    If mosquitoes need my blood for making babies isn’t it technically my baby

  • Reply Mohan Barman October 10, 2019 at 9:57 am

    I am wondering how they've put camera inside skin

  • Reply Song Lyrics October 10, 2019 at 11:07 am

    Me: has a mosquito bite so goes on YouTube and searches it

    YouTube: you will die

    Me: :/

  • Reply RNT Xcel October 10, 2019 at 3:34 pm

    One question, at 1:43 how in the world did they get the camera under the guys skin???

  • Reply Loso Damainman October 10, 2019 at 5:15 pm

    I wish they never exist

  • Reply Sofia Reyes October 10, 2019 at 9:00 pm

    We got a new mosquito virus that makes our brain swell istg i want these vampires extinct

  • Reply Amanda October 10, 2019 at 10:05 pm

    Thanks, I hate it.

  • Reply Lhoodie L October 11, 2019 at 12:13 pm

    That explains whenever i squash mosquitoes they spit out blood

  • Reply USS Arizona October 11, 2019 at 10:16 pm

    Mosquitos in warm weather: wE Be tHrIvInG

  • Reply Quiny 08 October 12, 2019 at 2:48 am

    Mosquito: takes blood

  • Reply Gamer Noob October 12, 2019 at 8:30 am

    If every see a monqusits it's me on 2:50

  • Reply Mc Ky FX October 12, 2019 at 12:43 pm

    I've been bitten by a mosquito like hundreds of times and I'm not still ded.

  • Reply Speed Slayer9758 October 12, 2019 at 1:58 pm

    Who gets triggers from this

  • Reply 田所浩二 October 12, 2019 at 4:59 pm

    Wow.. insects are tiny machine.. miracle of the nature

  • Reply R G October 12, 2019 at 8:50 pm

    im more scared of the sound for some reason

  • Reply Totoro Gachamations October 13, 2019 at 5:27 am

    I think vending machines kill more people then mosquitos and vending machines aren’t even an animal.

  • Reply Ebola October 13, 2019 at 1:07 pm

    Luckily we dont have mosquitoes in britain 🙂

  • Reply Selartos Music October 13, 2019 at 9:11 pm

    2:48 Satisfaction

  • Reply madmoiselle007 October 14, 2019 at 1:17 am

    Ewww so gross

  • Reply Prashanth Bhaskari October 14, 2019 at 8:48 am

    I'm donating my blood since 20yrs?

  • Reply Ghost Lazer October 14, 2019 at 4:47 pm

    One question:

    How do you put a camera on blood skin

  • Reply Xiong Zhao October 14, 2019 at 6:25 pm

    I just wanna kill them since they were larvae! By the way How to kill the larvae? I had tried before by a spray, but they don't die

  • Reply Kaden Nguyen October 15, 2019 at 1:50 am

    whoever volunteered to get bit by a mosquito needs a reward

  • Reply SAM UwU DJGODZILLA UwU SAM October 15, 2019 at 7:46 am

    I got bitin by a mosquito today
    1?= if got bitin by a mosquito

  • Reply HARIKRISHNAN October 15, 2019 at 5:06 pm

    അടിച്ച് കൊല്ലണം മൈരിനെ

  • Reply Sophia Fermin October 15, 2019 at 7:45 pm

    That’s why I’m sick and I have two mosquito bites on my leg and it was a mosquito?

  • Reply Houndstooth October 15, 2019 at 11:25 pm

    Tap in

  • Reply Billy John October 16, 2019 at 1:53 am

    Had a wife like this, except she sucked the joy out of everything instead :/

  • Reply That_sick _kid October 16, 2019 at 6:19 pm

    I hate mosquitoes. I'll kill all of them

  • Reply Siege October 17, 2019 at 12:13 am

    how’d they get a camera under his skin ?

  • Reply WorDSearcH October 17, 2019 at 12:39 am

    Burn em

  • Reply Gurkkaan October 17, 2019 at 9:57 am

    What do you mean u can die or get sick?? Ive been bitten like 10000000000000000 times by moscitos and ive never igen gotten sick

  • Reply Jimmy Yz October 17, 2019 at 12:43 pm

    Disclaimer: while making this video no mosquito was kill or harmed??

  • Reply James Carter October 17, 2019 at 2:59 pm

    Mosquitoes are the most hated insects.

  • Reply white tiger October 17, 2019 at 4:36 pm

    That's why god give example of mosquito in Quran.

  • Reply Laugher Nine October 18, 2019 at 2:46 am

    I’ve never hated an organism more

  • Reply jimmy herron October 18, 2019 at 6:05 am

    Most deadly animal in the world? How about insect instead?

  • Reply Oskar Xie October 18, 2019 at 9:18 am

    i think that a chinese museum ued ur video. idk if u know

  • Reply Dead Will October 18, 2019 at 11:06 am

    Stealing my blood without my consent

  • Reply fabian martinez October 18, 2019 at 11:23 pm

    A mosquito is biting me while I’m watching this video

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