{"id":73161,"date":"2023-11-14T10:00:59","date_gmt":"2023-11-14T17:00:59","guid":{"rendered":"https:\/\/askthescientists.com\/?p=73161"},"modified":"2023-11-16T09:51:33","modified_gmt":"2023-11-16T16:51:33","slug":"respiratory-system","status":"publish","type":"post","link":"https:\/\/askthescientists.com\/fr\/respiratory-system\/","title":{"rendered":"Respirez facilement et d\u00e9mystifiez votre syst\u00e8me respiratoire"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-73140\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2023\/11\/AdobeStock_496576474.jpeg\" alt=\"\" width=\"835\" height=\"514\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2023\/11\/AdobeStock_496576474.jpeg 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2023\/11\/AdobeStock_496576474-400x246.jpeg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2023\/11\/AdobeStock_496576474-768x473.jpeg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2023\/11\/AdobeStock_496576474-705x434.jpeg 705w\" sizes=\"(max-width: 835px) 100vw, 835px\" \/><\/p>\n<p>Inspirez&#8230; expirez. Vous le faites g\u00e9n\u00e9ralement 22\u00a0000 fois par jour et pourtant, la plupart d&#8217;entre nous consid\u00e8rent cette fonction comme allant de soi. C&#8217;est vrai, vous n&#8217;avez pas besoin d&#8217;y penser, votre corps le fait pour vous\u00a0: d&#8217;abord vous inspirez, puis vous expirez. Toutefois, si respirer peut sembler simple \u00e0 premi\u00e8re vue, il se passe beaucoup de choses sous la surface.<\/p>\n<p>Si vous vous \u00eates d\u00e9j\u00e0 interrog\u00e9 sur la science qui sous-tend votre respiration, nous avons l&#8217;information qu&#8217;il vous faut.<\/p>\n<h1>Votre syst\u00e8me respiratoire<\/h1>\n<p>Onze syst\u00e8mes d&#8217;organes assurent une grande vari\u00e9t\u00e9 de fonctions essentielles dans votre corps. Le syst\u00e8me respiratoire est responsable de la respiration.<\/p>\n<p>Il est compos\u00e9 de nombreux organes et tissus, notamment\u00a0:<\/p>\n<ol>\n<li><strong>Le diaphragme\u00a0:<\/strong> ce muscle en forme de d\u00f4me est situ\u00e9 \u00e0 la base de la cage thoracique. Lorsqu&#8217;il se contracte, le volume de la cavit\u00e9 thoracique augmente, ce qui cr\u00e9e une pression plus faible \u00e0 l&#8217;int\u00e9rieur du thorax pour aspirer l&#8217;air dans le corps.<\/li>\n<li><strong>La cavit\u00e9 nasale et la bouche\u00a0:<\/strong> chaque bouff\u00e9e d&#8217;air p\u00e9n\u00e8tre dans le corps par le nez ou la bouche. Les voies nasales permettent de filtrer et d&#8217;humidifier l&#8217;air avant qu&#8217;il n&#8217;atteigne les poumons, tandis que la bouche sert de voie de secours.<\/li>\n<li><strong>Le pharynx et le larynx\u00a0:<\/strong> le pharynx relie la bouche et les voies nasales \u00e0 l&#8217;\u0153sophage. Le larynx est l&#8217;organe musculaire qui contr\u00f4le les cordes vocales. Ensemble, ces structures servent de passerelle vitale pour permettre \u00e0 l&#8217;air de passer dans les voies respiratoires inf\u00e9rieures.<\/li>\n<li><strong>La trach\u00e9e\u00a0:<\/strong> ce tube solide, renforc\u00e9 par des anneaux de cartilage permet \u00e0 l&#8217;air de passer vers et depuis les poumons.<\/li>\n<li><strong>Les bronches\u00a0:<\/strong> la trach\u00e9e se divise en deux bronches reli\u00e9es \u00e0 chacun des poumons, o\u00f9 elles se divisent \u00e0 leur tour en de nombreuses bronchioles ressemblant aux branches d&#8217;un arbre.<\/li>\n<li><strong>Les poumons\u00a0:<\/strong> les principaux organes respiratoires consistent en deux structures spongieuses, de couleur gris ros\u00e9, situ\u00e9es dans la cage thoracique. Ils se gonflent d&#8217;air \u00e0 chaque inspiration et se d\u00e9gonflent \u00e0 l&#8217;expiration.<\/li>\n<li><strong>Les capillaires\u00a0:<\/strong> ces r\u00e9seaux de minuscules vaisseaux sanguins transportent l&#8217;oxyg\u00e8ne des poumons vers le syst\u00e8me sanguin.<\/li>\n<\/ol>\n<p>Ensemble, ces divers organes, tissus et structures vous permettent de respirer, parler, sentir, etc. Concentrons-nous maintenant sur la respiration.<\/p>\n<h1>Le processus respiratoire<\/h1>\n<p>La respiration est constitu\u00e9e de deux \u00e9tapes principales\u00a0: l&#8217;inspiration et l&#8217;expiration. Chacune d&#8217;entre elles n\u00e9cessite l&#8217;effort coordonn\u00e9 de plusieurs muscles. Avant et pendant l&#8217;inspiration, le diaphragme et les muscles environnants se contractent. Votre poitrine se dilate et vos poumons se remplissent d&#8217;air. Lorsque ces muscles se rel\u00e2chent, votre poitrine se contracte et expulse l&#8217;air de vos poumons. En d&#8217;autres termes, vous expirez.<\/p>\n<p>Votre corps n&#8217;inspire et n&#8217;expire pas pour le plaisir; il r\u00e9pond \u00e0 la n\u00e9cessit\u00e9 d&#8217;obtenir un apport en oxyg\u00e8ne.<\/p>\n<p>Vos cellules utilisent l&#8217;oxyg\u00e8ne (et le glucose) pour cr\u00e9er de l&#8217;\u00e9nergie gr\u00e2ce \u00e0 un processus appel\u00e9 \u00ab\u00a0respiration cellulaire\u00a0\u00bb. Pour ce faire, l&#8217;oxyg\u00e8ne doit \u00eatre achemin\u00e9 des poumons vers les cellules de l&#8217;organisme. C&#8217;est l\u00e0 que le sang entre en jeu.<\/p>\n<h2>Les \u00e9changes gazeux dans les alv\u00e9oles<\/h2>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-73148\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2023\/11\/respiratory-system.jpeg\" alt=\"\" width=\"400\" height=\"300\" \/><\/p>\n<p>Les bronches se ramifient en voies respiratoires plus petites, appel\u00e9es \u00ab\u00a0bronchioles\u00a0\u00bb. Elles sont reli\u00e9es aux alv\u00e9oles, qui sont de minuscules sacs d&#8217;air en forme de raisin dans les poumons, entour\u00e9s de capillaires. C&#8217;est l\u00e0 que se produisent les \u00e9changes gazeux, l&#8217;une des \u00e9tapes les plus importantes de la respiration.<\/p>\n<p>Les alv\u00e9oles sont comme des ballons microscopiques, qui se remplissent d&#8217;air \u00e0 chaque inspiration. L&#8217;oxyg\u00e8ne de cet air est absorb\u00e9 par le sang qui passe dans les capillaires environnants. Ce sang nouvellement oxyg\u00e9n\u00e9 est ensuite achemin\u00e9 dans l&#8217;organisme par le <a href=\"https:\/\/askthescientists.com\/cardiovascular-system-overview\/\">syst\u00e8me cardiovasculaire<\/a>, mais nous en reparlerons dans un autre article.<\/p>\n<p>La respiration cellulaire cr\u00e9e de l&#8217;\u00e9nergie, mais aussi des d\u00e9chets, dont le dioxyde de carbone, qui est contenu dans le sang d\u00e9soxyg\u00e9n\u00e9. Lorsque le sang passe dans les capillaires, un \u00e9change se produit\u00a0: l&#8217;oxyg\u00e8ne entre dans le sang (comme mentionn\u00e9 ci-dessus) et le dioxyde de carbone sort du sang, se d\u00e9pla\u00e7ant vers l&#8217;air contenu dans les alv\u00e9oles. Cet air est ensuite expir\u00e9 pour expulser le dioxyde de carbone de votre corps.<\/p>\n<h1>Comment garder ses poumons en bonne sant\u00e9?<\/h1>\n<p>Les poumons sont le centre du syst\u00e8me respiratoire. Des poumons en bonne sant\u00e9 sont essentiels pour une respiration efficace et saine. Heureusement, il existe un certain nombre de mesures que vous pouvez prendre pour garder vos poumons sains et heureux.<\/p>\n<p>Les poumons sont sensibles \u00e0 la fum\u00e9e et aux polluants, et l&#8217;inhalation de ces substances peut nuire \u00e0 la sant\u00e9 pulmonaire. La fum\u00e9e de cigarette, y compris le tabagisme passif, peut endommager les bronchioles et les alv\u00e9oles pulmonaires, ce qui emp\u00eache l&#8217;organisme de fournir suffisamment d&#8217;oxyg\u00e8ne aux cellules. Pour contrer cela, essayez de rester \u00e0 l&#8217;\u00e9cart de la fum\u00e9e de cigarette et du smog. Si vous ne pouvez pas \u00e9viter d&#8217;\u00eatre expos\u00e9 \u00e0 des produits chimiques agressifs, \u00e0 une pollution atmosph\u00e9rique excessive ou \u00e0 d&#8217;autres substances nocives, portez un masque ou un respirateur pour filtrer les substances nocives dans l&#8217;air.<\/p>\n<p>L&#8217;<a href=\"https:\/\/askthescientists.com\/exercise-and-your-body\/\">exercice r\u00e9gulier<\/a> peut \u00e9galement aider vos poumons (et votre c\u0153ur) \u00e0 travailler plus efficacement. Lorsque vous faites de l&#8217;exercice, vos poumons et les muscles associ\u00e9s \u00e0 la respiration font des heures suppl\u00e9mentaires pour fournir de l&#8217;oxyg\u00e8ne \u00e0 votre corps. Un exercice quotidien, m\u00eame l\u00e9ger, peut renforcer vos poumons, votre c\u0153ur et d&#8217;autres muscles. Plus ces organes et ces muscles sont forts, plus l&#8217;organisme est en mesure de fournir de l&#8217;oxyg\u00e8ne \u00e0 ses cellules.<\/p>\n<h1>Les affections respiratoires\u00a0: les facteurs de sant\u00e9 qui affectent vos poumons<\/h1>\n<p>Les facteurs environnementaux, tels que les polluants, ne sont pas les seuls \u00e0 pouvoir affecter votre syst\u00e8me respiratoire. Les maladies et les probl\u00e8mes de sant\u00e9 chroniques peuvent \u00e9galement avoir un impact sur votre capacit\u00e9 \u00e0 respirer.<\/p>\n<p>La capacit\u00e9 pulmonaire diminue naturellement avec l&#8217;<a href=\"https:\/\/askthescientists.com\/aging\/\">\u00e2ge<\/a>, ce qui signifie que les poumons deviennent moins efficaces. Pour les personnes \u00e2g\u00e9es, il est d&#8217;autant plus important de pr\u00e9server la sant\u00e9 de leurs poumons en faisant de l&#8217;exercice et en \u00e9vitant les substances nocives.<\/p>\n<p>En outre, certains \u00e9tats de sant\u00e9 peuvent n\u00e9cessiter une \u00e9valuation et une intervention m\u00e9dicales. Qu&#8217;il s&#8217;agisse d&#8217;asthme, d&#8217;allergies graves ou d&#8217;un rhume persistant, la consultation d&#8217;un m\u00e9decin est souvent une \u00e9tape importante dans le maintien de la sant\u00e9 du syst\u00e8me respiratoire. Certaines maladies, comme le rhume ou la grippe, peuvent \u00e9voluer vers des infections graves, voire des pneumonies. Si vous avez l&#8217;impression que votre syst\u00e8me respiratoire ne fonctionne pas comme il le devrait, une visite chez le m\u00e9decin s&#8217;impose.<\/p>\n<h1>En bref, un corps sain a besoin de poumons sains<\/h1>\n<p>La respiration est un \u00e9l\u00e9ment essentiel de la vie. Sans oxyg\u00e8ne, les cellules ne peuvent pas produire d&#8217;\u00e9nergie. Et si vos cellules ne produisent pas d&#8217;\u00e9nergie, la plupart des organes, des tissus et des autres parties du corps ne peuvent pas faire leur travail. Le cerveau ne peut rester que quatre minutes sans oxyg\u00e8ne avant de subir des dommages permanents.<\/p>\n<p>Il va sans dire qu&#8217;un syst\u00e8me respiratoire sain est indispensable \u00e0 un mode de vie sain. Prenez donc soin de vos poumons, car vous n&#8217;en avez que deux.<\/p>\n<div  class='togglecontainer av-15zkv1v-ab99c62de5b3070b567bcf14e5096a7e  avia-builder-el-0  avia-builder-el-no-sibling  toggle_close_all' >\n<section class='av_toggle_section av-374no3-4a41b31e1aebacaa86c6fda9f2f06343'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-1' data-fake-id='#toggle-id-1' class='toggler  av-title-above '  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-1' data-slide-speed=\"200\" data-title=\"R\u00e9f\u00e9rences\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: R\u00e9f\u00e9rences\" data-aria_expanded=\"Click to collapse: R\u00e9f\u00e9rences\">R\u00e9f\u00e9rences<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-1' aria-labelledby='toggle-toggle-id-1' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color '  itemprop=\"text\" ><p><a href=\"https:\/\/my.clevelandclinic.org\/health\/body\/21205-respiratory-system\"><span data-contrast=\"none\">https:\/\/my.clevelandclinic.org\/health\/body\/21205-respiratory-system<\/span><\/a><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><a href=\"https:\/\/www.lung.ca\/lung-health\/lung-info\/respiratory-system\"><span data-contrast=\"none\">https:\/\/www.lung.ca\/lung-health\/lung-info\/respiratory-system<\/span><\/a><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><a href=\"https:\/\/www.nhlbi.nih.gov\/health\/lungs\"><span data-contrast=\"none\">https:\/\/www.nhlbi.nih.gov\/health\/lungs<\/span><\/a><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><a href=\"https:\/\/craighospital.org\/resources\/how-we-breathe\"><span data-contrast=\"none\">https:\/\/craighospital.org\/resources\/how-we-breathe<\/span><\/a><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><a href=\"https:\/\/www.templehealth.org\/services\/lung\/patient-care\/patient-resources\/understanding-lung-disease\/how-lungs-work\"><span data-contrast=\"none\">https:\/\/www.templehealth.org\/services\/lung\/patient-care\/patient-resources\/understanding-lung-disease\/how-lungs-work<\/span><\/a><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><a href=\"https:\/\/www.webmd.com\/lung\/how-we-breathe\"><span data-contrast=\"none\">https:\/\/www.webmd.com\/lung\/how-we-breathe<\/span><\/a><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><a href=\"https:\/\/www.lung.org\/lung-health-diseases\/wellness\/exercise-and-lung-health\"><span data-contrast=\"none\">https:\/\/www.lung.org\/lung-health-diseases\/wellness\/exercise-and-lung-health<\/span><\/a><\/p>\n<\/div><\/div><\/div><\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Inspirez&#8230; expirez. Vous le faites g\u00e9n\u00e9ralement 22\u00a0000 fois par jour et pourtant, la plupart d&#8217;entre nous consid\u00e8rent cette fonction comme allant de soi. C&#8217;est vrai, vous n&#8217;avez pas besoin d&#8217;y penser, votre corps le fait pour vous\u00a0: d&#8217;abord vous inspirez, puis vous expirez. Toutefois, si respirer peut sembler simple \u00e0 premi\u00e8re vue, il se passe [&hellip;]<\/p>\n","protected":false},"author":21298,"featured_media":73143,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[284],"tags":[20759],"class_list":["post-73161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition_spotlight-fr","tag-body-systems-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Respirez facilement et d\u00e9mystifiez votre syst\u00e8me respiratoire - Ask The Scientists<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez la science qui se cache derri\u00e8re chacune de vos respirations gr\u00e2ce \u00e0 cette vue d&#039;ensemble du syst\u00e8me respiratoire humain.\" \/>\n<meta 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