How do cigarettes affect the body? – Krishna Sudhir

Cigarettes aren’t good for us. That’s hardly news–we’ve known
about the dangers of smoking for decades. But how exactly do cigarettes harm us? Let’s look at what happens
as their ingredients make their way through our bodies, and how we benefit physically
when we finally give up smoking. With each inhalation, smoke brings its more than 5,000
chemical substances into contact with the body’s tissues. From the start, tar,
a black, resinous material, begins to coat the teeth and gums, damaging tooth enamel,
and eventually causing decay. Over time, smoke also damages
nerve-endings in the nose, causing loss of smell. Inside the airways and lungs, smoke increases
the likelihood of infections, as well as chronic diseases
like bronchitis and emphysema. It does this by damaging the cilia, tiny hairlike structures whose job it is
to keep the airways clean. It then fills the alveoli, tiny air sacs that enable the exchange
of oxygen and carbon dioxide between the lungs and blood. A toxic gas called carbon monoxide
crosses that membrane into the blood, binding to hemoglobin and displacing the oxygen it would usually have transported
around the body. That’s one of the reasons smoking
can lead to oxygen deprivation and shortness of breath. Within about 10 seconds, the bloodstream carries a stimulant
called nicotine to the brain, triggering the release of dopamine
and other neurotransmitters including endorphins that create the pleasurable sensations
which make smoking highly addictive. Nicotine and other chemicals
from the cigarette simultaneously cause constriction
of blood vessels and damage their delicate
endothelial lining, restricting blood flow. These vascular effects lead
to thickening of blood vessel walls and enhance blood platelet stickiness, increasing the likelihood
that clots will form and trigger heart attacks and strokes. Many of the chemicals inside cigarettes
can trigger dangerous mutations in the body’s DNA that make cancers form. Additionally, ingredients like arsenic
and nickel may disrupt the process of DNA repair, thus compromising the body’s ability
to fight many cancers. In fact, about one of every three
cancer deaths in the United States is caused by smoking. And it’s not just lung cancer. Smoking can cause cancer
in multiple tissues and organs, as well as damaged eyesight and weakened bones. It makes it harder
for women to get pregnant. And in men,
it can cause erectile dysfunction. But for those who quit smoking, there’s a huge positive upside with almost immediate
and long-lasting physical benefits. Just 20 minutes after
a smoker’s final cigarette, their heart rate and blood pressure
begin to return to normal. After 12 hours,
carbon monoxide levels stabilize, increasing the blood’s
oxygen-carrying capacity. A day after ceasing, heart attack risk begins to decrease as
blood pressure and heart rates normalize. After two days, the nerve endings responsible
for smell and taste start to recover. Lungs become healthier
after about one month, with less coughing
and shortness of breath. The delicate hair-like cilia
in the airways and lungs start recovering within weeks, and are restored after 9 months,
improving resistance to infection. By the one-year anniversary of quitting, heart disease risk plummets to half
as blood vessel function improves. Five years in, the chance of a clot forming
dramatically declines, and the risk of stroke
continues to reduce. After ten years, the chances
of developing fatal lung cancer go down by 50%, probably because the body’s ability
to repair DNA is once again restored. Fifteen years in, the likelihood
of developing coronary heart disease is essentially the same
as that of a non-smoker. There’s no point pretending
this is all easy to achieve. Quitting can lead to anxiety
and depression, resulting from nicotine withdrawal. But fortunately,
such effects are usually temporary. And quitting is getting easier,
thanks to a growing arsenal of tools. Nicotine replacement therapy through gum, skin patches, lozenges, and sprays may help wean smokers off cigarettes. They work by stimulating
nicotine receptors in the brain and thus preventing withdrawal symptoms, without the addition
of other harmful chemicals. Counselling and support groups, cognitive behavioral therapy, and moderate intensity exercise also help smokers stay cigarette-free. That’s good news, since quitting puts you and your body
on the path back to health.

100 thoughts on “How do cigarettes affect the body? – Krishna Sudhir”

  1. Dont worry about your body its bigger than that . Way bigger , we are contributing to wrecking the alchemy of our planet . No joke . Put these things out now . Ive been a smoker for 25 years , where does the smoke finally rest ? In our clouds our skies its everywhere . Save the planet or atleast help somewhat . Yes our bodies are important but aslong as we idol our bodies as a priority our world is doomed . Be a leader not a follower . Ive quit after following the smoke trail . Im sorry for contributing to this . Efags are bad for the skies aswell . Wanna know whos really chemtrailing ? ITS US ITS ALL OF US . ciggarettes , coal , fire , gunpowder omg i could go on . Please think about it . Please act on it . Please do it .

  2. 28-year-old student here!
    During the last months I've experienced some depression and endured major stress (from studies and other factors). Because of this, I resorted to cigarettes to calm the nerves.
    In total, I've only smoked around 5-6 packs of cigarettes (ever), but I am still somewhat nervous about permanent damage to my organs, as well as cancer development.
    Is there a way of knowing what kind of impact short-term smoking might have on the body? And am I getting worked up for nothing? =/

  3. So why doze the government alow cigarettes to be sold on every street corner threw out the country. Hows that for legal crinnamlization. A discrace

  4. 21 september 2017 –> quit smoking

    almost two years and i can relate all the drawback from addicted and positive effect after quitting

  5. I smoked like 16 times that's it after I watch this it's help me that's smoking is killing me slowly I have the rights to quit I can do it ! Thx to this vid

  6. For anyone who is looking to quit, smoking cessation aids (Nicorette etc) increase your odds tremendously. Fact! Don’t discount them or tell yourself they are too expensive. None are as expensive as smoking was.

  7. Former smoker only cause of vaping. Had vape for almost one year till I gave that up as well.
    Clean for almost 3months and loss 20 pounds only cause I had to change my life. Now I am addicted to working out, running weights cardio you name it. Anyone can do. Don’t give up guys.

  8. Please watch these video's, these guys have the answers to what has been happening in the USA
    and why, Please watch AND

  9. I smoke for 15 years and I stop cold Turkey. How ? My lung can not stand hay . I started short of breathe hard to breathe. The left side of my face gets irritated by my jaw i believed its a lymph node. I have high blood pressure. I finally stop about 11 months. Believed me i miss it but that part in my brain is like beacon or tattoo when the cigarette comes close to my mouth and i put it down . The only time when you truly stop when your body gets sick every day not normal the superman is gone. Best of luck to all.

  10. my mother in law is why i will never smoke…she looks like a rotting corpse losing her teeth and her voice sounds like the voice box guy on south park.

  11. 29 days since my last ciggy and going strong..I feel better already..used to smoke a pack a day for around 12 years or so

  12. Haven't touched a cigarette for nearly 6 months. Coming from a daily smoker. Still having a hard time exercising though, but I'm getting there💪🏿.
    Props to those that have quit and encouragement to those that are trying!✌🏿

  13. Informative video and it is very useful and knowledgeable. I really enjoyed reading this video. Big fan, thank you! I am so glad about you. If anyone wants to recovery from drug addiction, you can visit us at-


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  16. I stopped smoking this January as my New Year resolution and let me tell you this: the first few days are gonna be hard but after the first month you will realise how good is to not smoke anymore.

    Tips: stop chucking alcohol as that is one of the main reason I used to go back to smoking. Also, exercise more, it will help you not think about smoking…and forget about E-cigs, cause I've seen people stop smoking for a few days thanks to E-cigs and then went back on smoking both of them.

  17. I stopped smoking this January as my New Year resolution and let me tell you this: the first few days are gonna be hard but after the first month you will realise how good is to not smoke anymore.

    Tips: stop chucking alcohol as that is one of the main reason I used to go back to smoking. Also, exercise more, it will help you not think about smoking…and forget about E-cigs, cause I've seen people stop smoking for a few days thanks to E-cigs and then went back on smoking both of them.

  18. but what about idiots? Is there a way to prevent idiots from victimizing themselves by saying ''boohoo I got cancer'' after you told them for 20 years that if they keep smoking 10 cigs a day they will develop lung cancer? What if they come up with the excuse that ''I was fine for 10 years, I didn't get lung cancer from smoking'', are they a lost cause?

  19. Wierd how I'm here watching a video on how cigarettes affect your body. I know there bad for me, but at the same time I'm depressed and don't really care at all. One cigarette couldn't hurt right? I mean I drink so what difference does it make. We're all going die some day. Might as well go on your own terms 🙁

  20. 感謝Ted做出那麼棒的影片教育人們
    Thanks so much for making this fantastic educational video!! Good job Ted!

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