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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
time!

James Carver

100 Replies to “How Mosquitoes Use Six Needles to Suck Your Blood | Deep Look”

  1. So they saw the skin to suck blood?
    And leaves the saliva???
    EWWWWWWW
    WHAT KIND OF SUBSTANCE THAT THEY GIVE US?!
    OI
    And plus
    So technically the mosquitoes need blood for they're babies???
    You know what I'm lactose intolerant so I WILL INFEXT THE MOSQUITOES WITH MT LACTOSE INTOLERANT BLOOOOD

  2. I have caught a baby mosquito before and I accidentally killed it but I don’t feel bad now that I know what they actually are! lol they are cool tho when there babies

  3. Who likes grabbing the mosquito and rippings its head of or pop its stomach or pop it..? just me? OK

  4. Greetings to the Management of Deep Look • PBS! I am a TV Researcher from the Philippines and we are currently working on a story about dengue since recently, our local health department declared dengue outbreak as a National Epidemic due to abrupt rise of dengue deaths in the Philippines. In this light, how would be the process if we would like to air a few seconds from the video showing the macro shots of the mosquito? Rest assured that proper acknowledgment and courtesy will be given as soon as the segment airs on Sept. 9, 2019 on our local channel. We are asking for your permission and approval of this request. Looking forward to hearing from you and hoping for positive remarks on this. More power to the team! Thank you and God bless!

  5. Recently i got malaria. It made me very sick. I thought that I am going to die. The treatment tripped us of our budget. It was expensive. But at least I am still alive. Now I hate mosquitoes more than ever. Please kill these buggers, don't let them breed in the first place, don't let them suck your blood and give you fatal diseases.

  6. Person tears mosquito apart
    Narrator: stays calm and keep talking
    Me: thinks about a meme with a person face saying”WHAT THE ****”

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