Krajty kr\u00e1lovsk\u00e9, proslul\u00ed svou smrt\u00edc\u00ed technikou \u0161krcen\u00ed, disponuj\u00ed pozoruhodnou schopnost\u00ed efektivn\u011b d\u00fdchat, i kdy\u017e zrovna ze sv\u00e9 ob\u011bti vyma\u010dk\u00e1vaj\u00ed \u017eivot. Tento \u010dl\u00e1nek se pono\u0159\u00ed do tajemstv\u00ed za jejich jedine\u010dn\u00fdmi d\u00fdchac\u00edmi adaptacemi a zkoum\u00e1, jak p\u0159ekon\u00e1vaj\u00ed v\u00fdzvy d\u00fdch\u00e1n\u00ed b\u011bhem \u0161krcen\u00ed.<\/p>\n\n
Kdy\u017e se krajty kr\u00e1lovsk\u00e9 ovinou kolem sv\u00e9 ob\u011bti, vyvinou obrovsk\u00fd tlak, kter\u00fd ob\u011bti zastav\u00ed krevn\u00ed ob\u011bh. Tento tlak tak\u00e9 stla\u010duje vlastn\u00ed pl\u00edce hada, co\u017e zt\u011b\u017euje norm\u00e1ln\u00ed d\u00fdch\u00e1n\u00ed.<\/p>\n\n
Krajty vyvinuly unik\u00e1tn\u00ed d\u00fdchac\u00ed mechanismus zn\u00e1m\u00fd jako modul\u00e1rn\u00ed plicn\u00ed ventilace. Tato adaptace jim umo\u017e\u0148uje p\u0159esunout m\u00edsto sv\u00e9ho d\u00fdch\u00e1n\u00ed do r\u016fzn\u00fdch \u010d\u00e1st\u00ed plic a hrudn\u00edku v z\u00e1vislosti na jejich \u010dinnosti.<\/p>\n\n
Krajty maj\u00ed velmi ohebn\u00e9 \u017eebra, kter\u00e1 se mohou pohybovat nez\u00e1visle. B\u011bhem \u0161krcen\u00ed deaktivuj\u00ed svaly \u017eeber na p\u0159edn\u00ed stran\u011b t\u011bla, kde je tlak nejv\u011bt\u0161\u00ed. Sou\u010dasn\u011b aktivuj\u00ed svaly \u017eeber na zadn\u00ed stran\u011b a pou\u017e\u00edvaj\u00ed je k pumpov\u00e1n\u00ed vzduchu p\u0159es pl\u00edce.<\/p>\n\n
Zadn\u00ed \u010d\u00e1st plic hada obsahuje balonovitou strukturu, kter\u00e1 funguje jako m\u011bch. \u010cerp\u00e1n\u00edm kysl\u00edku p\u0159es tuto strukturu mohou krajty udr\u017eovat stabiln\u00ed p\u0159\u00edsun kysl\u00edku do sv\u00e9ho krevn\u00edho ob\u011bhu, a to i kdy\u017e jsou jejich p\u0159edn\u00ed pl\u00edce stla\u010deny.<\/p>\n\n
V\u011bdci se domn\u00edvaj\u00ed, \u017ee v\u00fdvoj modul\u00e1rn\u00ed plicn\u00ed ventilace u krajty mohl b\u00fdt kl\u00ed\u010dov\u00fdm faktorem, kter\u00fd umo\u017enil rozvoj jejich loveck\u00e9 techniky \u0161krcen\u00ed. D\u00edky schopnosti efektivn\u011b d\u00fdchat b\u011bhem \u0161krcen\u00ed z\u00edskaly krajty zna\u010dnou v\u00fdhodu p\u0159i zdol\u00e1v\u00e1n\u00ed sv\u00e9 ko\u0159isti.<\/p>\n\n
Schopnost krajt p\u0159esunout sv\u00e9 d\u00fdch\u00e1n\u00ed do r\u016fzn\u00fdch \u010d\u00e1st\u00ed t\u011bla m\u016f\u017ee tak\u00e9 napom\u00e1hat jejich pohybu. Jejich \u017eebra jsou zapojena jak do d\u00fdch\u00e1n\u00ed, tak do pohybu, tak\u017ee tato flexibilita jim umo\u017e\u0148uje d\u00fdchat a pohybovat se sou\u010dasn\u011b.<\/p>\n\n
A\u010dkoli se v\u00fdzkum modul\u00e1rn\u00ed plicn\u00ed ventilace zam\u011b\u0159oval p\u0159edev\u0161\u00edm na krajty kr\u00e1lovsk\u00e9, je mo\u017en\u00e9, \u017ee by z t\u00e9to adaptace mohly m\u00edt prosp\u011bch i ne\u0161krt\u00edc\u00ed hadi. Nap\u0159\u00edklad zmije maj\u00ed mimo\u0159\u00e1dn\u011b dlouh\u00e9 pl\u00edce a konzumuj\u00ed velk\u00e1 j\u00eddla, kter\u00e1 roztahuj\u00ed jejich t\u011bla a stla\u010duj\u00ed jejich pl\u00edce. Existuje hypot\u00e9za, \u017ee zmije by mohly tak\u00e9 vyu\u017e\u00edvat modul\u00e1rn\u00ed plicn\u00ed ventilaci k p\u0159ekon\u00e1n\u00ed t\u011bchto tr\u00e1vic\u00edch v\u00fdzev.<\/p>\n\n
Schopnost krajt kr\u00e1lovsk\u00fdch efektivn\u011b d\u00fdchat b\u011bhem \u0161krcen\u00ed je pozoruhodn\u00e1 adaptace, kter\u00e1 jim umo\u017e\u0148uje zdolat ko\u0159ist a p\u0159e\u017e\u00edt ve sv\u00e9m prost\u0159ed\u00ed. Jejich syst\u00e9m modul\u00e1rn\u00ed plicn\u00ed ventilace v kombinaci s jejich pru\u017en\u00fdm hrudn\u00edm ko\u0161em jim umo\u017e\u0148uje p\u0159ekonat v\u00fdzvy d\u00fdch\u00e1n\u00ed pod extr\u00e9mn\u00edm tlakem. K \u00fapln\u00e9mu pochopen\u00ed d\u016fsledk\u016f t\u00e9to adaptace jak u \u0161krt\u00edc\u00edch, tak ne\u0161krt\u00edc\u00edch had\u016f je zapot\u0159eb\u00ed dal\u0161\u00edho v\u00fdzkumu.<\/p>","protected":false},"excerpt":{"rendered":"
Krajt kr\u00e1lovsk\u00e1: Mist\u0159i d\u00fdch\u00e1n\u00ed pod tlakem \u00davod Krajty kr\u00e1lovsk\u00e9, proslul\u00ed svou smrt\u00edc\u00ed technikou \u0161krcen\u00ed, disponuj\u00ed pozoruhodnou schopnost\u00ed efektivn\u011b d\u00fdchat, i kdy\u017e zrovna ze sv\u00e9 ob\u011bti vyma\u010dk\u00e1vaj\u00ed \u017eivot. Tento \u010dl\u00e1nek se…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[280],"tags":[1647,931,136,2545,23830],"class_list":["post-18213","post","type-post","status-publish","format-standard","hentry","category-zoology","tag-adaptation","tag-respiration","tag-evolution","tag-snakes","tag-boa-constrictors"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/18213","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=18213"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/18213\/revisions"}],"predecessor-version":[{"id":18214,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/18213\/revisions\/18214"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=18213"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=18213"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=18213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}