How Do We Cough? - The Mechanism of Coughing - Cough Reflex Animation - Learn Human Body
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- čas přidán 26. 12. 2014
- Coughing is a sudden expulsion of air from the lungs through the epiglottis at an amazingly fast speed (estimated at 100 miles per hour). With such a strong force of air, coughing is the body’s mechanism for clearing the breathing passageways of unwanted irritants.
In order for a cough to occur, several events need to take place in sequence. First, the vocal cords open widely, allowing additional air to pass through into the lungs.
Then the epiglottis closes off the windpipe (larynx), and simultaneously, the abdominal and rib muscles contract, increasing the pressure behind the epiglottis. With the increased pressure, the air is forcefully expelled, and creates a rushing sound as it moves very quickly past the vocal cords. The rushing air dislodges the irritant, making it possible to breathe comfortably again.
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Cough
A cough (About this sound pronunciation (help·info) Latin: tussis) is a sudden and often repetitively occurring reflex which helps to clear the large breathing passages from secretions, irritants, foreign particles and microbes. The cough reflex consists of three phases: an inhalation, a forced exhalation against a closed glottis, and a violent release of air from the lungs following opening of the glottis, usually accompanied by a distinctive sound.[1] Coughing is either voluntary or involuntary.
Frequent coughing usually indicates the presence of a disease. Many viruses and bacteria benefit evolutionarily by causing the host to cough, which helps to spread the disease to new hosts. Most of the time, irregular coughing is caused by a respiratory tract infection but can also be triggered by choking, smoking, air pollution,[1] asthma, gastroesophageal reflux disease, post-nasal drip, chronic bronchitis, lung tumors, heart failure and medications such as ACE inhibitors.
Treatment should target the cause; for example, smoking cessation or discontinuing ACE inhibitors. Cough suppressants such as codeine or dextromethorphan are frequently prescribed, but have been demonstrated to have little effect. Other treatment options may target airway inflammation or may promote mucus expectoration. As it is a natural protective reflex, suppressing the cough reflex might have damaging effects, especially if the cough is productive.[2]
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The mechanism of cough
How do we cough? What happens in you throat and lungs? This action reminds one of a pressure cooker blowing off steam.
Sensing something is wrong…
Both the upper and lower airways are lined by slow-reacting and fast reacting receptors which can respond to a number of different types of stimuli ranging from dust to irritant gases as well as excess mucus. Once the receptors are triggered, a signal is sent via the vagus nerve, setting up a reflex with the signal being transmitted to your brainstem and consciousness making you aware that you need to clear these noxious particles or gases.
Preparing for the cough…
The cough centre situated in the medulla in a matter of milliseconds, makes your consciousness aware of the fact that you need to cough as well as sending impulse back down to the diaphragm and intercostal rib muscles, preparing them for the cough action.
The first action is that the diaphragm ‘drops’ to suck air into the chest filling the thoracic cavity. The second action following the diaphragm movement is the glottis or ‘voice box’ closes to prevent any air from leaving the chest.
Finally the actual cough…
Thereafter the cough centre triggers the diaphragm and intercostal muscles to contract, making the thoracic cavity smaller and building up pressure inside the chest… then the closed glottis opens allowing the high pressure air to suddenly escape from the chest through the airways hopefully taking with it any irritating particles, foreign bodies or phlegm which triggered the entire reflex to start with. Air leaving the chest can reach speeds of up to 200 km/h and even faster in the event of a sneeze!
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Pathophysiology
A cough is a protective reflex in healthy individuals which is influenced by psychological factors.[3] The cough reflex is initiated by stimulation of two different classes of afferent nerves, namely the myelinated rapidly adapting receptors, and nonmyelinated C-fibers with endings in the lungs. However it is not certain that the stimulation of nonmyelinated C-fibers leads to cough with a reflex as it's meant in physiology (with its own five components): this stimulation may cause mast cells degranulation (through an asso-assonic reflex) and edema which may work as a stimulus for rapidly adapting receptors.
who else is sick watching this
Zyhir Harris me
I can't stop coughing 😢
Mee smh
DJ Kitten SAME
Me
lol I'm watching while I'm coughing😂😂😂😂
sameeeereee
same I've got a bad cold
same
how decrece voice box
Same here xd
watching while im dying of a cough attack at 1:44 am
thank god for the internet, otherwise this completely random question would've never been answered
why..? see I'm also suffer from dry cough it's too long time ..wt is the good suggest for us avoid friend
That’s a whole mood right there.
That slow cough demonstration is pure gold
im coughing rn so much and its annoying af bc i can't sleep
go to chest doctor
Bit late for that lmao...
damn im back at it again with another cough/cold
Lauren Wilkinson same here😥can't sleep.
Syed Khurram that sound is cough😐
That moment when you choke on your own saliva...
My own body wants to kill me xD
So next time when somebody is saying are you ok i'll just say that i'm dislodging irritants XD
watching this because i'm coughing, when will this end :(
Lmao. Did it ever end?
God bless this answer !!!!!!!! Killed of my damn curiosity !!!!!!!!!!! (cough still continues)
I love the sound of the glottis closing
Excellent Video🤘👍
much help very thank
Morning sarks, I've been up all night coughing & ive got a busy day on with amber & her lil pals😫😫😫
*bless* *you*
That explains why I cough constantly without no air when I choke on my own Silvia
Who's watching this during covid?
Ok, so that explains coughing when you swallow some water in the wrong pipe. But what about when you are ill?
knowledge me about cough, many thanks
Nice !!
I CAN'T STOP COUGHING MY THROAT IS ITCHY TOO!!!!
am i the only one who can choke on a cough
Your not the only one
Breathe well.
I been coughing for over 3 hours and my throat hurts like crazy
You know what’s an irritant? Coughing for 3 days straight ffs
the background music makes me feel like i am watching some sorta documentary on WW2
I’m watching this while I have the flu and a really bad cough
Hi. Good one
I’m coughing so much I can’t breathe
I’m high as fuck rn this shit funny as hell
So small foods and drinks can go down the wrong tube and trigger a cough.
cough
Dang
And this took us (humans) 4.6 billion years to discover ._.
Watching it while coughing , sneezing & runny nose. #Covid-ve 😂
I'm high as duck rn
who gives a fuck with that weakass bunkkk weed
420 OG did you just assume gender?
Trevor Thompson
What duh duck
Damn! Same Here Bro!
Thintipes
I'm with all the people who have been coughing.
I couldn't attend school since I got pretty bad-
I just wanna know, why the hell it comes at night super strong coughs.
My guess would be (if your sick) all that mucous settles in your chest while you breath and lay flat
I've been coughing for two weeks
Jack Hwang cough is really serious like diseases virus
Jack Hwang me too its been two weeks and im not even sick anymore. Did it stop for you?
Fuckin hell i was drinking water
And for no fuckin reason my throat decided to
start iching and COUGH
ALL OVER MY FUCKING LAPTOP
Can clean it with brush ??
...kindness I can show ...drink hot water first before your prescribed medicine ,zyra...
Good, informative video. Thumbs up!
does the cough force vary (in mph) if you're a skinny guy or bodybuilder with abs?
I guess not; you need to be healthy, that's it.
It does not depend on your abs strenght, but it depends on your diaphragm and intercostal muscles strenght.
I hope that helps
@@alexbanetminguezbm3576 Was just curious if a bodybuilder can cough harder than someone who is skinny because when people cough their stomach muscles clench.
Yes
@@Sharadshingade9850 So for example Dwayne the rock Johnson can cough harder than some who is thin as a rail and no abs.
We are super creation of God. Almighty n powerful.
Lordt
Allah
How can you prove that god exists?
Im not coughing. Im just interested in how it works lol
I'm coughing so much I can barley breath and I want to gag so much rn .
I'm dying and I wanted to see what was happening
It’s funny to see comments here that they’re watching this while they’re coughing because damn man I am too! ~cough cough
Why does this video only mention the epiglottis closing but not the glottis? Wouldn't the vocal folds close during a cough?
nah
What's the difference?
When I cough I swear I feel something move/reflex upwards for a split second in my stomach lol. This didn't show that though.
So if there's mucus in there I cough in my throat sounds so weird
Sheet Head Yeah, it's almost like my throat vibrates.
wow
Wow 100 mph
Oh ok so thats why I always ‘choke’ on my own saliva or while drinking water
why do i always look st videos about coughing when im hugh
Yeah but I am now coughing so so so much and I can't sleep I have temperature
Soundtrack: Eureka - by Huma-Huma
It feels like someones in my lungs tickling it
Same
I love science if you love science say #science4life
Im coughing but im not sick and its 12:27 i cant sleep and i have to wake up at 7:00 for school wtf. .
I've been coughing for 2 weeks. And it's getting worse
I think I have snot stuck in my throat
Then how are we able to couch for no reason? Like acting that you're coughing?
HenryStickman Xyavilzheus that’s a good question. It’s not like we can convincingly sneeze on purpose, we’d have to trigger it. We can imitate the sound I guess but not the sensation.
🤔🤔🤔🤔
great music
Soundtrack: Eureka- by Huma-Huma
I'm very sick today
I can't stop caughing
I have a running nose, can not controlled it
🤧🤒🤒
nice
Hal Life 3 will be released in * cough cough * **COUGH**
Well I’m sick and I was about to cough but then I farted... ups
I’m fucking dieing coughing here and you’re calcuting the force of air ?
I’ve been coughing all day I just want to punch myself in the damn throat. I feel my throat is now irritated. Ugh I’m over this
i have a cough raigth now its soo hard tu talk 😑
When I get sick I cough so much I cough blood.
you need to go to your doctor coughing with blood is not a good symptom .
Bro you need jesus
Alive yet?
@@-stewe4999 i think he met jesus by now
@@muthahirmujthaba that's tuff
only 360p
I'm coughing from past 10days 😭
Kathyayini Kanekal sorry
Kathyayini Kanekal u have tb QUICK GO TO DOCTOR
wooow
Bronchitis patient is here
i got a stupid head cold
Who is watching this while coughing ? 😷
I have a cough......ewww the vocal cord🤮🤮🤮🤮🤮
Me
What if u puke?the coughing will stop?
Nah. It wont
lol I'm here because food stuck in my windpipe. feeling discomfort.
bruh
*cough*
:)
WTF THAT THUMBNAIL
SCARY SHIT
ME ME BIG COUGH
هههههههه متاكم
Any Mexicans watching this?
Me