En hayati organ\u0131m\u0131z kalbimiz hakk\u0131nda daha \u00e7ok bilgi edinmeye ne dersiniz? Sizin i\u00e7in haz\u0131rlad\u0131\u011f\u0131m\u0131z i\u00e7eri\u011fimizde kalbimiz nas\u0131l \u00e7al\u0131\u015f\u0131r, v\u00fccudumuzdaki i\u015flevi nedir, \u00e7al\u0131\u015fma sistemi nas\u0131ld\u0131r ve daha bir\u00e7ok soruyu yan\u0131tlad\u0131k.<\/p>\n\n\n\n
Kalp, v\u00fccuda pompalad\u0131\u011f\u0131 temiz kan\u0131 g\u00f6nderir ard\u0131ndan kullan\u0131lan temiz kan\u0131 geri al\u0131r. Temizlenmesi i\u00e7in akci\u011fere g\u00f6nderir, geri al\u0131r ve tekrar v\u00fccuda g\u00f6nderir. Kalbin temel g\u00f6revi kan pompalamakt\u0131r; bu nedenle de kas dokuya sahiptir. Kan\u0131n akci\u011ferlere gidi\u015f geli\u015fi pulmoner dola\u015fm yani k\u00fc\u00e7\u00fck dola\u015f\u0131m; ard\u0131ndan v\u00fccuda da\u011f\u0131lmas\u0131 ile sistematik kan dola\u015f\u0131m\u0131 yani b\u00fcy\u00fck dola\u015f\u0131m ger\u00e7ekle\u015fir. Atardamarlar sayesinde kan kalpten organlara ta\u015f\u0131n\u0131rken toplardamarlar ile de geri toplan\u0131r.<\/p>\n\n\n\n
Kan, v\u00fccudumuz i\u00e7in gerekli besin maddelerini ve oksijeni sa\u011flar. Kalp ise kan\u0131 dola\u015f\u0131m sistemimiz i\u00e7inde hareket ettiren, kas grubundan olu\u015fan bir pompad\u0131r. Kalbimiz, g\u00f6\u011fs\u00fcm\u00fcz\u00fcn ortas\u0131nda g\u00f6\u011f\u00fcs kemi\u011finin hemen alt\u0131nda yer al\u0131r. Bu organ\u0131n d\u0131\u015f y\u00fcz\u00fc perikard denilen bir zar ile kapl\u0131d\u0131r. Bu zar ile kalp aras\u0131nda kalbin \u00e7al\u0131\u015f\u0131rken rahat hareket edebilmesi i\u00e7in az bir miktarda kayganla\u015ft\u0131r\u0131c\u0131 s\u0131v\u0131 bulunur. Bir pompa sistemi gibi \u00e7al\u0131\u015fan kalp, kan\u0131 toplardamarlar ile v\u00fccuttan toplar ard\u0131ndan oksijenlenmesi i\u00e7in akci\u011fere yollar oksijenden zenginle\u015fmi\u015f olan kan yeniden v\u00fccuda pompalan\u0131yor.<\/p>\n\n\n\n
Hayati organ\u0131m\u0131z kalp, d\u00f6rt odac\u0131ktan olu\u015fuyor. Kalbin kapaklar\u0131 t\u0131pk\u0131 tek y\u00f6ne a\u00e7\u0131lan kap\u0131lar gibidir, kan\u0131n d\u00f6rt odac\u0131kta ak\u0131\u015f\u0131n\u0131 s\u00fcrekli kontrol ederler. Dola\u015f\u0131m, v\u00fccuttan gelen kan\u0131n sa\u011f kulak\u00e7\u0131\u011fa girmesi ile ba\u015flar ve sa\u011f alt b\u00f6l\u00fcme ge\u00e7mesi ile devam ediyor. Pulmoner kapaktan ge\u00e7erek pulmoner arter ile akci\u011ferlere gidiyor. Kan\u0131n akci\u011ferde oksijenlenmesi ile sol ve sa\u011f pulmoner venler\u2019den sol kulak\u00e7\u0131\u011fa giriyor. Mitral kapa\u011f\u0131 ge\u00e7erek sol kar\u0131nc\u0131\u011fa ge\u00e7iyor. Sol alt b\u00f6l\u00fcm yani sol ventrik\u00fcl\u00fcn g\u00fc\u00e7l\u00fc kaslar\u0131 kas\u0131ld\u0131\u011f\u0131nda oksijen bak\u0131m\u0131ndan zengin olan kan, aort kapa\u011f\u0131ndan ge\u00e7erek aort ismi verilen ana atar damar ve dallar\u0131 ile da\u011f\u0131larak v\u00fccudumuzun ihtiya\u00e7lar\u0131n\u0131 kar\u015f\u0131l\u0131yor.<\/p>\n\n\n\n
G\u00fc\u00e7l\u00fc kalbimizin bir dakika i\u00e7inde yakla\u015f\u0131k 5.5 litre kan pompalad\u0131\u011f\u0131n\u0131 biliyor musunuz? Bu da g\u00fcnde 8 ton, y\u0131la 3000 ton, 80 y\u0131lda ise 240.000 ton kan anlam\u0131na geliyor.<\/p>\n\n\n\n
Akci\u011fer atardamar\u0131 giri\u015finde bulunan kapak\u00e7\u0131klar ile aort kapak\u00e7\u0131\u011f\u0131 birbirine benzer yap\u0131dad\u0131r. Kapak\u00e7\u0131klar kan\u0131n ak\u0131\u015f y\u00f6n\u00fcne g\u00f6re a\u00e7\u0131lma yapar ve sonras\u0131nda eski haline d\u00f6nerek kan\u0131n tekrar geri akmas\u0131n\u0131 engellemek i\u00e7in d\u00fczelir. Kalp kapak\u00e7\u0131klar\u0131n\u0131 \u00fczeri sar\u0131 ve beyaz renkte \u00e7izgili zarla kapl\u0131d\u0131r.<\/p>\n\n\n\n
Trik\u00fcspid kapak ile mitral kapak di\u011ferlerinin aksine g\u00f6r\u00fcn\u00fc\u015f olarak benzerli\u011fe sahip olsa da yap\u0131lar\u0131 farkl\u0131 ve karma\u015f\u0131kt\u0131r. Trik\u00fcspid kapak isminden de anla\u015f\u0131laca\u011f\u0131 gibi \u00fc\u00e7 par\u00e7adan, mistral ise iki par\u00e7adan meydana gelir. Kapak par\u00e7alar\u0131 i\u00e7erisinden kar\u0131nc\u0131k \u00e7evresine do\u011fru uzanan kaslarda Chordaetendineae ismiyle an\u0131lan lifler yer al\u0131r. Kar\u0131nc\u0131kta olu\u015fan her kas\u0131lmada kar\u0131nc\u0131k kaslar\u0131 bu lifleri gererek kapanmas\u0131n\u0131 sa\u011flar ve kan kulak\u00e7\u0131\u011fa geri ka\u00e7maz.<\/p>\n\n\n\n
Kalp her vuru\u015funda iki kulak\u00e7\u0131k ayn\u0131 anda kas\u0131l\u0131r ve kar\u0131nc\u0131klara kan pompalamaya ba\u015flar. Ard\u0131ndan kar\u0131nc\u0131klarda kas\u0131lma yapar. Bunun bir elektriksel zamanlama sistemi ile ger\u00e7ekle\u015fti\u011fini s\u00f6yleyebiliriz. Kalbin sa\u011f kulak\u00e7\u0131\u011f\u0131 \u00fcst\u00fcnde yer alan odak noktas\u0131 sino-atrial d\u00fc\u011f\u00fcmd\u00fcr ve kalbin \u00e7al\u0131\u015fmas\u0131n\u0131 denetleyen kilit k\u0131s\u0131md\u0131r. Bu k\u0131s\u0131mdan elektriksel uyar\u0131 yay\u0131larak, kulak\u00e7\u0131klar\u0131n kas\u0131lmas\u0131na olanak sa\u011flar. Kar\u0131nc\u0131klar ve kulak\u00e7\u0131klar\u0131n birle\u015fme noktalar\u0131nda ise atrioventrik\u00fcler d\u00fc\u011f\u00fcm bulunur. Kas\u0131lma uyar\u0131s\u0131n\u0131n gelmesi bu k\u0131s\u0131mda minik bir miktar gecikmeye neden olur; bunun ismi his demetidir.<\/p>\n\n\n\n
Fundomundo\u2019da yer alan Deneylerle \u00d6\u011freniyoruz: Kalbimiz Nas\u0131l \u00c7al\u0131\u015f\u0131r? dersi<\/a>nde ke\u015fif\u00e7i minikler kalbin nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 e\u011flenceli bir deney ile \u00f6\u011freniyorlar. Online e\u011fitim platformu Fundomundo\u2019da \u00c7ocuklar \u0130\u00e7in Bilim Dersleri<\/a> kategorisinde bir\u00e7ok \u00e7ocuklar i\u00e7in deneyler dersleri<\/a> temal\u0131 at\u00f6lyeler yer al\u0131yor.<\/p>\n","protected":false},"excerpt":{"rendered":" En hayati organ\u0131m\u0131z kalbimiz hakk\u0131nda daha \u00e7ok bilgi edinmeye ne dersiniz? Sizin i\u00e7in haz\u0131rlad\u0131\u011f\u0131m\u0131z i\u00e7eri\u011fimizde kalbimiz nas\u0131l \u00e7al\u0131\u015f\u0131r, v\u00fccudumuzdaki i\u015flevi nedir, \u00e7al\u0131\u015fma sistemi nas\u0131ld\u0131r ve daha bir\u00e7ok soruyu yan\u0131tlad\u0131k. Kalbimiz…<\/p>\n","protected":false},"author":2,"featured_media":2906,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"powerkit_post_featured":[],"_links":{"self":[{"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/posts\/2905"}],"collection":[{"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/comments?post=2905"}],"version-history":[{"count":1,"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/posts\/2905\/revisions"}],"predecessor-version":[{"id":2907,"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/posts\/2905\/revisions\/2907"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/media\/2906"}],"wp:attachment":[{"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/media?parent=2905"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/categories?post=2905"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/tags?post=2905"},{"taxonomy":"powerkit_post_featured","embeddable":true,"href":"https:\/\/www.fundomundo.com\/kesfet\/wp-json\/wp\/v2\/powerkit_post_featured?post=2905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}