{"id":432,"date":"2022-02-08T07:30:25","date_gmt":"2022-02-08T06:30:25","guid":{"rendered":"https:\/\/www.bretzel-liquide.com\/blog\/?p=432"},"modified":"2022-02-08T07:30:25","modified_gmt":"2022-02-08T06:30:25","slug":"pare-a-faire-surface","status":"publish","type":"post","link":"https:\/\/www.bretzel-liquide.com\/blog\/2022\/02\/08\/pare-a-faire-surface\/","title":{"rendered":"par\u00e9 \u00e0 faire surface"},"content":{"rendered":"\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 608 \/ 1080;\" width=\"608\" controls src=\"https:\/\/www.bretzel-liquide.com\/blog\/wp-content\/uploads\/2022\/02\/baleine-sous-marin-pare-a-faire-surface.mp4\"><\/video><figcaption>par\u00e9 \u00e0 faire surface. sous-marin \/ baleine<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"pare-a-faire-surface\">par\u00e9 \u00e0 faire surface<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Un\u00a0<strong>sous<\/strong>&#8211;<strong>marin<\/strong>\u00a0plonge et fait\u00a0<strong>surface<\/strong>\u00a0en remplissant et en vidant ses ballasts. Ces derniers sont totalement remplis en immersion et l&rsquo;\u00e9quilibre entre poids du\u00a0<strong>sous<\/strong>&#8211;<strong>marin<\/strong>\u00a0et la pouss\u00e9e d&rsquo;Archim\u00e8de est recherch\u00e9. La chasse envoie de l\u2019air en haut des ballasts, cet air pousse l\u2019eau qui s\u2019\u00e9vacue par le bas. Le sous-marin est alors par\u00e9 \u00e0 faire surface. Concr\u00e8tement, sans vitesse, le\u00a0<strong>sous<\/strong>&#8211;<strong>marin<\/strong>\u00a0reste stable en immersion. source : <a href=\"https:\/\/www.defense.gouv.fr\/content\/download\/599779\/10113895\/Plong%C3%A9e%20et%20retour%20en%20surface.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">defense.gouv.fr<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"paree-a-faire-surface\">par\u00e9e \u00e0 faire surface<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le syst\u00e8me respiratoire des baleines a pour principale fonction d\u2019effectuer les \u00e9changes gazeux dans le corps et de stocker l\u2019oxyg\u00e8ne dans le sang pour le distribuer partout dans le corps. L\u2019air se propage dans les alv\u00e9oles des poumons, de petits sacs qui se remplissent d\u2019oxyg\u00e8ne \u00e0 chaque respiration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Certaines adaptations \u00e9volutives aident les baleines \u00e0 respirer plus efficacement dans le milieu marin. Les narines, qu\u2019on appelle&nbsp;<a href=\"https:\/\/baleinesendirect.org\/decouvrir\/la-vie-des-baleines\/comportement\/souffle\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u00e9vents<\/a>, se situent sur le dessus de la t\u00eate. Certaines esp\u00e8ces en ont une seule; d\u2019autres deux. Une sorte de coussin adipeux, un tissu graisseux, les referme pour emp\u00eacher l\u2019eau de s\u2019infiltrer dans le syst\u00e8me respiratoire et de l\u2019endommager. L\u2019\u00e9vent s\u2019ouvre lorsque la baleine est \u00e0 la surface pour expirer et inspirer l\u2019air en une seule s\u00e9quence. Gr\u00e2ce \u00e0 leur \u00e9vent simple ou double, les baleines peuvent inspirer et expirer \u00e0 toute vitesse et avec puissance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019inspiration et l\u2019expiration sont une action compl\u00e8tement volontaire qui se fait tr\u00e8s rapidement. Elles expirent d\u2019abord avant d\u2019inspirer, contrairement \u00e0 l\u2019humain. La respiration peut se faire en une seule s\u00e9quence, mais le r\u00e9approvisionnement en oxyg\u00e8ne ne se fait pas aussi efficacement que si la baleine respire plus d\u2019une fois. Apr\u00e8s une longue plong\u00e9e en apn\u00e9e, plus de respirations auront lieu avant la prochaine plong\u00e9e, pour que la baleine puisse reprendre son souffle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"a-la-surface\">\u00c0 la surface<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La respiration d\u2019un grand rorqual prend de 1 \u00e0 2\u00a0secondes seulement. \u00c0 chaque respiration, les baleines remplacent jusqu\u2019\u00e0 90\u00a0% de l\u2019air contenu dans leurs poumons (contre 10-15\u00a0% pour les humains). Il est expuls\u00e9 de leurs poumons \u00e0 grande vitesse par leur \u00e9vent et cr\u00e9e le\u00a0<a href=\"https:\/\/baleinesed.wpengine.com\/decouvrir\/la-vie-des-baleines\/comportement\/souffle\/\" target=\"_blank\" rel=\"noreferrer noopener\">souffle<\/a>, cette haute colonne d\u2019air.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Par St\u00e9phanie Tremblay sur <a href=\"https:\/\/baleinesendirect.org\/comment-fonctionne-le-systeme-respiratoire-des-baleines\/\" target=\"_blank\" rel=\"noreferrer noopener\">baleinesendirect<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>par\u00e9 \u00e0 faire surface Un\u00a0sous&#8211;marin\u00a0plonge et fait\u00a0surface\u00a0en remplissant et en vidant ses ballasts. Ces derniers sont totalement remplis en immersion et l&rsquo;\u00e9quilibre entre poids du\u00a0sous&#8211;marin\u00a0et la pouss\u00e9e d&rsquo;Archim\u00e8de est recherch\u00e9. La chasse envoie de l\u2019air en haut des ballasts, cet air pousse l\u2019eau qui s\u2019\u00e9vacue par le bas. Le sous-marin est alors par\u00e9 \u00e0 faire [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"video","meta":{"footnotes":""},"categories":[89],"tags":[250,253,252,251,18],"class_list":["post-432","post","type-post","status-publish","format-video","hentry","category-nos-amis-les-brette","tag-baleine","tag-mogilite","tag-respiration","tag-sous-marin","tag-video","post_format-post-format-video"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>par\u00e9 \u00e0 faire surface - \u00e0 l&#039;ombre d&#039;un paradoxe en fleur<\/title>\n<meta name=\"description\" content=\"par\u00e9 \u00e0 faire surface. Un\u00a0sous-marin\u00a0plonge et fait\u00a0surface gr\u00e2ce \u00e0 ses ballasts. 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