{"id":149,"date":"2024-01-23T18:58:02","date_gmt":"2024-01-23T17:58:02","guid":{"rendered":"https:\/\/socbarhonova.tbw.cz\/?page_id=149"},"modified":"2024-01-24T21:57:55","modified_gmt":"2024-01-24T20:57:55","slug":"krev","status":"publish","type":"page","link":"https:\/\/socbarhonova.tbw.cz\/?page_id=149","title":{"rendered":"Krev"},"content":{"rendered":"\n

Ka\u017ed\u00fd z n\u00e1s zn\u00e1 ji jako \u010dervenou kapalinu, kter\u00e1 neust\u00e1le proud\u00ed na\u0161\u00edm t\u011blem. N\u00e9 v\u0161ichni ale v\u00ed, co v\u0161echno obsahuje a jak moc je pro spr\u00e1vn\u00e9 fungov\u00e1n\u00ed na\u0161eho organismu d\u016fle\u017eit\u00e9 udr\u017eovat v n\u00ed rovnov\u00e1hu. <\/p>\n\n\n\n

Krev je tvo\u0159ena pevn\u00fdmi elementy ozna\u010dovan\u00fdmi jako krevn\u00ed bu\u0148ky<\/strong>, kter\u00fdmi jsou \u010derven\u00e9 a b\u00edl\u00e9 krvinky<\/em><\/strong> spolu s krevn\u00edmi desti\u010dkami<\/strong>.<\/em> Ty plavou v pr\u016fhledn\u00e9 na\u017eloutl\u00e9 tekutin\u011b, takzvan\u00e9 krevn\u00ed plazm\u011b<\/strong>.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u010cERVEN\u00c9 KRVINKY<\/strong> neboli erytrocyty <\/strong><\/em>jsou bezjadern\u00e9 bu\u0148ky obsahuj\u00edc\u00ed hemoglobin, kter\u00fd na sebe v\u00e1\u017ee kysl\u00edk a z\u00e1rove\u0148 zp\u016fsobuje jejich specifick\u00e9 \u010derven\u00e9 zbarven\u00ed. Tvar jejich pod\u00e9ln\u00e9ho \u0159ezu je \u010dasto p\u0159irovn\u00e1v\u00e1n k cukr\u00e1\u0159sk\u00e9mu pi\u0161kotu. D\u00edky pru\u017en\u00e9 membr\u00e1n\u011b a absenci bun\u011b\u010dn\u00e9ho j\u00e1dra jsou schopny p\u0159izp\u016fsobit se a proj\u00edt i p\u0159es drobn\u00e9 kapil\u00e1ry, kter\u00e9 \u010dasto maj\u00ed mnohem men\u0161\u00ed pr\u016fm\u011br ne\u017e samotn\u00e9 erytrocyty.<\/p>\n\n\n\n

B\u00cdL\u00c9 KRVINKY<\/strong> neboli leukocyty<\/strong> jsou d\u016fle\u017eitou slo\u017ekou imunitn\u00edho syst\u00e9mu. V krvi se vyskytuj\u00ed v men\u0161\u00edm po\u010dtu ne\u017e krvinky \u010derven\u00e9, na druhou stranu jsou oproti nim ale v\u00fdrazn\u011b v\u011bt\u0161\u00ed. jsou bu\u0148kami jadern\u00fdmi. Podle dal\u0161\u00edch specifik se mohou rozd\u011blovat na granulocyty <\/strong>a agranulocyty<\/strong>.<\/p>\n\n\n\n

KREVN\u00cd DESTI\u010cKY<\/strong> neboli trombocyty<\/em><\/strong> jsou nejmen\u0161\u00edmi bu\u0148kami tvo\u0159\u00edc\u00ed krev, nemaj\u00ed j\u00e1dro a jsou diskovit\u00e9ho tvaru. Hraj\u00ed velmi d\u016fle\u017eitou roli p\u0159i zran\u011bn\u00edch a krv\u00e1cen\u00edch, kter\u00e1 zastavuj\u00ed pomoc\u00ed procesu tzv. hemokoagulace (zastaven\u00ed krv\u00e1cen\u00ed a tvorba strupu).<\/p>\n\n\n\n

KREVN\u00cd PLAZMA<\/strong> je tekutou slo\u017ekou krve skl\u00e1daj\u00edc\u00ed se p\u0159ibli\u017en\u011b z 90% vody. Zbylou \u010d\u00e1st tvo\u0159\u00ed d\u016fle\u017eit\u00e9 miner\u00e1ly, b\u00edlkoviny a \u017eiviny pot\u0159ebn\u00e9 pro bu\u0148ky tk\u00e1n\u00ed.<\/p>\n\n\n\n

Krev jako t\u011bln\u00ed tekutina pln\u00ed pro na\u0161e t\u011blo n\u011bkolik v\u00fdznamn\u00fdch funkc\u00ed:<\/strong><\/p>\n\n\n\n

    \n
  1. transport – p\u0159enos d\u016fle\u017eit\u00fdch l\u00e1tek a plyn\u016f (kysl\u00edk, \u017eiviny, vitam\u00edny, hormony) do tk\u00e1n\u00ed<\/li>\n\n\n\n
  2. obranna – \u00fa\u010dast na imunitn\u00edch reakc\u00edch<\/li>\n\n\n\n
  3. termoregulace – udr\u017euje st\u00e1lou teplotu na\u0161eho t\u011bla<\/li>\n\n\n\n
  4. udr\u017eov\u00e1n\u00ed pH, tlaku a objemu – dal\u0161\u00ed d\u016fle\u017eit\u00e9 faktory pro vnit\u0159n\u00ed prost\u0159ed\u00ed na\u0161eho organismu <\/li>\n<\/ol>\n\n\n\n

    Co se fyzik\u00e1ln\u00edch vlastnost\u00ed t\u00fd\u010de, nelze krev pova\u017eovat za ide\u00e1ln\u00ed kapalinu. D\u00edky jej\u00ed vysok\u00e9 viskozit\u011b se toti\u017e jej\u00ed proud\u011bn\u00ed p\u0159i\u0159azuje k proud\u011bn\u00edm TURBULENTN\u00cdM. Tento fakt \u00fazce souvis\u00ed s patologi\u00ed c\u00e9v, kter\u00e9 se v\u011bnuji na str\u00e1nce NEJ\u010cAST\u011aJ\u0160\u00cd ONEMOCN\u011aN\u00cd<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Ka\u017ed\u00fd z n\u00e1s zn\u00e1 ji jako \u010dervenou kapalinu, kter\u00e1 neust\u00e1le proud\u00ed na\u0161\u00edm t\u011blem. N\u00e9 v\u0161ichni ale v\u00ed, co v\u0161echno obsahuje a jak moc je pro spr\u00e1vn\u00e9 fungov\u00e1n\u00ed na\u0161eho organismu d\u016fle\u017eit\u00e9 udr\u017eovat v n\u00ed rovnov\u00e1hu. Krev je tvo\u0159ena pevn\u00fdmi elementy ozna\u010dovan\u00fdmi jako krevn\u00ed bu\u0148ky, kter\u00fdmi jsou \u010derven\u00e9 a b\u00edl\u00e9 krvinky spolu s krevn\u00edmi desti\u010dkami. Ty plavou […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/socbarhonova.tbw.cz\/index.php?rest_route=\/wp\/v2\/pages\/149"}],"collection":[{"href":"https:\/\/socbarhonova.tbw.cz\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/socbarhonova.tbw.cz\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/socbarhonova.tbw.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/socbarhonova.tbw.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=149"}],"version-history":[{"count":10,"href":"https:\/\/socbarhonova.tbw.cz\/index.php?rest_route=\/wp\/v2\/pages\/149\/revisions"}],"predecessor-version":[{"id":206,"href":"https:\/\/socbarhonova.tbw.cz\/index.php?rest_route=\/wp\/v2\/pages\/149\/revisions\/206"}],"wp:attachment":[{"href":"https:\/\/socbarhonova.tbw.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}