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</ iframe > </noscript> <!-- End Google Tag Manager (noscript) --><div id="header"> <div id="CClogo"><a href="https://www.cookchildrens.org"><span class="srText">Cook Children's</span></a></div> <div id="CCsearch"> <form id="searchform" name="searchform" method="GET" onsubmit="return (this.q.value == '') ? false : true;" action="/CookChildrens/en/parents/"> <input type="hidden" name="search" value="y"/> <input type="hidden" name="getfields" value="description"/> <input type="search" class="search" name="q" id="q" maxlength="256" autocomplete="off" autocorrect="off" placeholder="Search"/> <input type="hidden" name="datasource" value="cookchildrens"> <input type="hidden" name="start" value="0"> <input type="hidden" name="rows" value="10"> <input type="hidden" name="lang" value="english"> <input type="hidden" name="section" value="parents_teens_kids"> <input type="submit" value="" id="searchButton" class="buttonImage"/> </form> </div> </div> <!-- If we have main navigation separated then it will reside here --> <div id="thelou" tabindex="-1"> </div> <div id="mainContentContainer" class="kh-article-page"> <div id="rsSearchBrowse"> <div id="rsBrowse" role="navigation"> </div> <div id="rsSearch"> <div id="rsSectionLabel">parents</div> </div> </div> <div id="khContentHeading" class="ar licH"> <h1>Dictionary: Left Atrium</h1> </div> <div class="clearBox"> </div> <div id="khcontent"> <div id="xp1"> </div><br clear="all" style="width: 0; height: 0; line-height: 0; font-size: 0;"><div id="khcontent_article" lang="en-us"> <div id="NavigatePage1"> <div id="whichRead_1"><span class="ISI_MESSAGE"><!-- The following article is brought to you by CookChildrens. --></span><div class="rs_skip rs_skip_en rsbtn_kidshealth rs_preserve" id="readspeaker_button1"><script> var theRSURL = (escape(document.location.href)); var rsAudioTitle = document.title.replace(/ |\'|\?/g,"_"); var whichReadPage = 1; var doesItGotFlash = ''; makeTheRSLinkEN(); var readSpeakerDownloadLink = "//app-na.readspeaker.com/cgi-bin/rsent?customerid=5202&lang=en_us&voice=Kate&speed=100&readid=khcontent_article&url="+theRSURL+"&audiofilename=KidsHealth_"+rsAudioTitle+""; </script></div> <!--googleoff:all--> <div id="languagePairLink" class="rs_skip"><a href="/CookChildrens/es/parents/dictionary-left-atrium.html"><span class="pairedURLHead" lang="es">en español<img src="/images/n00/icons/langPairArrow.svg" alt=""></span><span class="pairedURLBody" lang="es">Diccionario: Aurícula izquierda</span></a></div> <!--googleon:all--><div class="rte-image"><!--<sly data-sly-test.buttonBorder="khb-noborder"></sly> --><p><strong>Left atrium:</strong> one of the four chambers of the <a href="/CookChildrens/en/parents/heart.html">heart</a>. The left atrium receives blood full of oxygen from the lungs and then empties the blood into the <a href="/CookChildrens/en/parents/dictionary-left-ventricle.html">left ventricle</a>.</p></div><div class="rte-image"><!--<sly data-sly-test.buttonBorder="khb-noborder"></sly> --><p class="right"><img src="/content/dam/patientinstructions/en/images/aorticStenEstab_415x259_enIL.png" alt="Two diagrams show the position of the heart in the body and a close-up, cross section of a healthy heart. Blood flows from the left atrium into the left ventricle and through a valve into the aorta. " /></p></div><span class="ISI_MESSAGE"><!--Thank you for listening to this KidsHealth audio cast. The information you heard, is for educational purposes only. If you need medical advice, diagnoses, or treatment, consult your doctor. This audio cast is Copyrighted by KidsHealth. All rights are reserved.--></span></div> </div> </div> </div> <!--googleoff:all--> <div id="relatedBoxParents" class="t1 "> <div id="navTabs"> <ul id="navTabsPKT" role="tablist" aria-labelledby="moreOnThisTopicHeader"> <li role="presentation" class="current" id="PKTtabParents"><button class="PKTJSTButton" role="tab" id="parents_tab" aria-controls="relatedArticlesListParents" aria-selected="true" tabindex="0"><span>for Parents</span></button></li> </ul> </div> <div id="mainBar"> </div> <div id="mrLinks"> <h2 id="moreOnThisTopicHeader">MORE ON THIS TOPIC</h2> <ul id="relatedArticlesListParents" role="tabpanel" aria-labelledby="parents_tab"> <li><a href="/CookChildrens/en/parents/dictionary-aorta.html">Dictionary: Aorta</a></li> <li><a href="/CookChildrens/en/parents/dictionary-left-ventricle.html">Dictionary: Left Ventricle</a></li> <li><a href="/CookChildrens/en/parents/dictionary-blalock.html">Dictionary: Blalock-Taussig-Thomas (BTT) shunt</a></li> <li><a href="/CookChildrens/en/parents/dictionary-open-heart.html">Dictionary: Open-Heart Surgery</a></li> <li><a href="/CookChildrens/en/parents/dictionary-interstage.html">Dictionary: Interstage Period</a></li> <li><a href="/CookChildrens/en/parents/dictionary-heart-transplant.html">Dictionary: Heart Transplant</a></li> <li><a href="/CookChildrens/en/parents/dictionary-blood-pressure.html">Dictionary: Blood Pressure</a></li> <li><a href="/CookChildrens/en/parents/dictionary-ivc.html">Dictionary: Inferior Vena Cava</a></li> <li><a href="/CookChildrens/en/parents/dictionary-sano.html">Dictionary: Sano shunt</a></li> <li><a href="/CookChildrens/en/parents/dictionary-svc.html">Dictionary: Superior Vena Cava</a></li> <li><a href="/CookChildrens/en/parents/dictionary-single-vent-defect.html">Dictionary: Single Ventricle Defect</a></li> <li><a href="/CookChildrens/en/parents/heart.html">Heart and Circulatory System</a></li> <li><a href="/CookChildrens/en/parents/hypoplastic-heart.html">Hypoplastic Left Heart Syndrome (HLHS)</a></li> </ul> </div> <div id="boxBreaker"> </div> <div id="zeroTester"> </div> <div id="relatedButtonsHolder"> <div id="relatedButtonsBoth"> <ul> <li id="relatedPrinterButton"><a href="/CookChildrens/en/parents/dictionary-left-atrium.html?view=ptr" rel="nofollow" onclick="printWindow(this.href); return false;" title="This link will open in a new window.">Print<span class="newWindowIcon_leftSpace"> </span></a></li> <li id="relatedEmailFriendButton"><a rel="nofollow" href="/CookChildrens/en/parents/dictionary-left-atrium.html?view=emailto" target="_blank" title="This link will open in a new window.">Send to a Friend<span class="newWindowIcon_leftSpace"> </span></a></li> </ul> </div> </div><br clear="all"></div><br clear="all"><script>window.onload=setVars('');PKTChoose(13,0,0,0);</script><div id="kh_lic_footer"> <nav aria-label="Content info"> <ul id="kh_lic_footer_links"> <li><a href="/CookChildrens/en/parents/editorial-policy-licensee.html">Editorial Policy</a></li> <li><a href="/CookChildrens/en/parents/policy-licensees.html">KidsHealth Privacy Policy & Terms of Use</a></li> <li><a href="/CookChildrens/en/parents/copyright.html">Copyright</a></li> </ul> </nav> <div id="kh_lic_footer_legalease"> <p><img lang="en" alt="A KidsHealth Education Partner" src="/images/n00/logos/eduPartner3.svg"> Note: All information is for educational purposes only. 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