[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.insaan.cz\/proc-je-pro-nas-kyslik-tak-dulezity\/#Article","mainEntityOfPage":"https:\/\/www.insaan.cz\/proc-je-pro-nas-kyslik-tak-dulezity\/","headline":"Pro\u010d je pro n\u00e1s kysl\u00edk tak d\u016fle\u017eit\u00fd","name":"Pro\u010d je pro n\u00e1s kysl\u00edk tak d\u016fle\u017eit\u00fd","description":"Dnes funguje \u017eivot na b\u00e1zi kysl\u00edku. Bez n\u011bj nem\u016f\u017ee na Zemi prakticky \u017e\u00e1dn\u00fd organismus existovat, od \u0159as a\u017e","datePublished":"2022-10-28","dateModified":"2023-09-28","author":{"@type":"Person","@id":"https:\/\/www.insaan.cz\/author\/#Person","name":"","url":"https:\/\/www.insaan.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/91b1fc57487c55a66a7777af0dd690bf69c571b4a9b15cda0db8854a78b7888c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/91b1fc57487c55a66a7777af0dd690bf69c571b4a9b15cda0db8854a78b7888c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"insaan.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.insaan.cz\/wp-content\/uploads\/art466448_4x3_20261016_050515_KvZ4VJ.jpg","url":"https:\/\/www.insaan.cz\/wp-content\/uploads\/art466448_4x3_20261016_050515_KvZ4VJ.jpg","height":0,"width":0},"url":"https:\/\/www.insaan.cz\/proc-je-pro-nas-kyslik-tak-dulezity\/","about":["V\u011bda"],"wordCount":413,"articleBody":"\tDnes funguje \u017eivot na b\u00e1zi kysl\u00edku. Bez n\u011bj nem\u016f\u017ee na Zemi prakticky \u017e\u00e1dn\u00fd organismus existovat, od \u0159as a\u017e po lidi. Pro\u010d je ale pro n\u00e1s pr\u00e1v\u011b tento plyn tak d\u016fle\u017eit\u00fd, zvl\u00e1\u0161t\u011b kdy\u017e je pouze v\u00a0relativn\u011b n\u00edzk\u00e9 koncentraci okolo 21 %?\tZde je pot\u0159eba \u0159\u00edci, \u017ee tomu tak nebylo v\u017edy. V\u00a0dob\u00e1ch, kdy se za\u010daly vyv\u00edjet prvn\u00ed organismy, nebyl v\u00a0atmosf\u00e9\u0159e kysl\u00edk v\u016fbec \u017e\u00e1dn\u00fd. Teprve pot\u00e9, co prvn\u00ed p\u0159edci dne\u0161n\u00edch \u0159as za\u010daly vyu\u017e\u00edvat k\u00a0z\u00edsk\u00e1v\u00e1n\u00ed energie fotosynt\u00e9zu, se situace zm\u011bnila, a to dost drasticky.\tJen m\u00e1lokdo si uv\u011bdomuje, \u017ee kysl\u00edk je v\u00a0podstat\u011b jedovat\u00fd plyn. T\u00edm, \u017ee se dostal do atmosf\u00e9ry, a z\u00a0n\u00ed pak i do mo\u0159e. To zp\u016fsobilo prvn\u00ed velk\u00e9 vym\u00edr\u00e1n\u00ed v\u00a0historii na\u0161\u00ed planety. Naprost\u00e1 v\u011bt\u0161ina organism\u016f, kter\u00e9 v\u00a0t\u00e9 dob\u011b \u017eily, vyhynulo. Ty zbyl\u00e9 se adaptovaly.\tVelmi brzy v\u0161ak zjistili, \u017ee kysl\u00edk, a\u010d jedovat\u00fd, je velmi reaktivn\u00ed a je velmi dobr\u00fdm nosi\u010dem a zdrojem energie. Jako takov\u00fd jej za\u010daly tak\u00e9 vyu\u017e\u00edvat. Byl to toti\u017e o mnoho efektivn\u011bj\u0161\u00ed zp\u016fsob ne\u017e ten, kter\u00fd jsme znali z\u00a0d\u0159\u00edv\u011bj\u0161ka.\tN\u00e1sledn\u011b se pak vyvinuly specializovan\u00e9 org\u00e1ny, ur\u010den\u00e9 pr\u00e1v\u011b k\u00a0z\u00edsk\u00e1v\u00e1n\u00ed kysl\u00edku, nejprve \u017e\u00e1bry a pozd\u011bji, kdy\u017e se \u017eivot p\u0159esunul i na sou\u0161, pl\u00edce. A tento syst\u00e9m funguje dodnes, i kdy\u017e je pravda, \u017ee obsah kysl\u00edku v\u00a0atmosf\u00e9\u0159e se zna\u010dn\u011b m\u011bnil.\tNap\u0159\u00edklad v\u00a0druhohor\u00e1ch byl mnohem vy\u0161\u0161\u00ed, ne\u017e dnes, p\u0159es 30 %. D\u00edky tomu mohl mimo jin\u00e9 hmyz dos\u00e1hnout takov\u00fdch rozm\u011br\u016f, \u017ee byly k\u00a0vid\u011bn\u00ed nap\u0159\u00edklad v\u00e1\u017eky s\u00a0dvoumetrov\u00fdm rozp\u011bt\u00edm k\u0159\u00eddel. To dnes nen\u00ed mo\u017en\u00e9, nebo\u0165 atmosf\u00e9ra nen\u00ed dostate\u010dn\u011b okysli\u010den\u00e1, aby mohla podporovat metabolismus takov\u00fdchto t\u011bl.\t\tI tak se v\u0161ak bez n\u011bj neobejdeme, a rozhodn\u011b bychom m\u011bli tedy chr\u00e1nit i jeho producenty. Pokud se n\u00e1m toti\u017e poda\u0159\u00ed zlikvidovat i je, zni\u010d\u00edme t\u00edm v\u00a0podstat\u011b \u017eivot, jak ho zn\u00e1me. A to by byla mnohem v\u011bt\u0161\u00ed katastrofa, ne\u017e si kdokoliv z\u00a0n\u00e1s dok\u00e1\u017ee p\u0159edstavit, v\u011bt\u0161\u00ed ne\u017e i v\u00fdbuch atomov\u00e9 bomby. Proto je pot\u0159eba \u017eivotn\u00ed prost\u0159ed\u00ed chr\u00e1nit.                                                                                                                                                                                                                                                                                                                                                                                        4\/5 - (1 vote)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Pro\u010d je pro n\u00e1s kysl\u00edk tak d\u016fle\u017eit\u00fd","item":"https:\/\/www.insaan.cz\/proc-je-pro-nas-kyslik-tak-dulezity\/#breadcrumbitem"}]}]