How do cigarettes affect the body? – Krishna Sudhir

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 comments on “How do cigarettes affect the body? – Krishna Sudhir

  1. jesus christ on a tricycle Post author

    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.

  2. nitesh Post author

    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

  3. Ghost Post author

    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!✌?

  4. Recoverri Connection Post author

    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-

  5. dillyn stanton Post author


  6. titijqlrjrlpap trtruqlplplapapapa Post author


  7. FullmetalBeard Post author

    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.

  8. FullmetalBeard Post author

    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.

  9. llVIU Post author

    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?

  10. Seabreez 24 Post author

    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 🙁

  11. 淳淳 Post author

    Thanks so much for making this fantastic educational video!! Good job Ted!

  12. Nafrost Post author

    What happens if I use stuff that smokers use to prevent nicotine withdrawal, but I don't smoke?
    I mean if a non smoker use stuff like the skin patches, can they become addicted to them?
    If they work by stimulating nicotine receptors in the brain, what prevents me from also becoming addicted to them?
    Especially if I'm a non smoker so my brain will react more to nicotine stimulations.

  13. Ms.Greasy Line Post author

    My grandma on my dad and moms side both died from smoking smh. My mom finally stoped after 20 years and has been clean for 3 years

  14. Javier Espinoza Post author

    Hope someone can help me with my concern, my dad has been smoking since he was 9 yrs old , he is 70 now and still smoking, he is diabetic. I want to help him stop smoking but at this point sometimes I think it will do more harm than good if he stops.

  15. pinkywinky222 Post author

    Quitting smoking 7 years ago was one of the best decisions of my life. And now my sister stopped smoking too. ?

  16. D. C Post author

    I've been so stressed that I'm tempted to smoke I'm watching videos on youtube to talk myself out of it and its kinda working thank you ted

  17. thejas skandan Post author

    Oh my God! this video is so informative and I came to know that smoking not only causes heart and lung problems but also causes tooth decay and more. I was watching another video a while ago and I came to know about the effects of smoking in the long term and how it it leads to obesity. Tap the link below:

  18. Shoeb Khan Post author

    So I gave up smoking 5 days ago and this was in my recommendation… Okay youtube, i get it, i quit for realzz

  19. fellow traveller Post author

    It's not suddenly dropping dead from heart attack that concerns me so much. It's the possibility of having a stroke, and being forced to keep living in a body that no longer obeys one's commands.

  20. Rick Seto Post author

    please have attention to intangible addictions too like social media, internet, facebook, instagram they cause mental health issues which is more dangerous than physical addiction

  21. Arefhussain Ebrahimi Post author

    You know what?
    I,m very hope,because I have no addiction so I,m very lucky man?
    Choose the right way

  22. Aiden Pettigrew Post author


  23. Kavan Koobkoob Post author

    I was called Mr somke because i used to smoke 1.5 packs every day for 15 years. I have been nicotine free for 10 mounth.cold turkey. it is amazing.the more you go the easier it gets.
    Everybody can quit smoking if they want to.

  24. Dirk Post author

    Watching this as a sixteen year old who has been a daily smoker for almost a year and a half really puts stuff into perspective. I've been meaning to stop for a while and will try to seek help by telling my parents. I know it will be a hard journey but i hope i will have the strenght to quit for not just for a while but for ever.
    Wish me luck

  25. GameLover97 Post author

    22 year old lady, being with my smoking dad everyday and with my smoking wormkates Mon-Fri. Never touched a cigarrette!

  26. Manuel Tegel Post author

    Why should i pay a lot of money to destroy my body, suffer and geht diseases?!
    For me there is NO, really NO reason to smoke

    btw sorry for my bad english – i am German

  27. Negan Post author

    But I'm only smoke when there's too many problem in my life and I feel depressed ,,at that time of my life I do it

  28. Bastard The Clown Post author

    Damm. I dont want these things to happen to me. The euphoric effect just feels so supportive. Especially when you have had a bad day

  29. Thu Nell Ⓥ Post author

    I feel weak.
    I hate the industry for making this available. When I started as a kid I didn't have the mental base to realize how bad it is.
    Would it not have been there in the first place, I wouldn't smoke now.
    But I'll win… starting now!

  30. Amy Walker Post author

    going to use a quote from this in my psychology assignment, is the author Krishna sudhir? i am just doing the reference now

  31. slaywee Post author

    i don't know if those things have effect or not can't be sure, i mean i know my friends who been smoking for 20 years now and are still active and more energetic better than me.


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