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    • Upper two heart chambers

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      • The upper two heart chambers are called atria. Atria are separated by an interatrial septum into the left atrium and the right atrium.
      www.thoughtco.com/atria-of-the-heart-anatomy-373232

      Atria of the Heart Function - ThoughtCo

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  3. www.thoughtco.com › atria-of-the-heart-anatomy-373232Atria of the Heart Function - ThoughtCo

    Atria are separated by an interatrial septum into the left atrium and the right atrium. The lower two chambers of the heart are called ventricles. Atria receive blood returning to the heart from the body and ventricles pump blood from the heart to the body.

    • Valves

      Mitral Valve: This heart valve is located between the left...

  4. www.kenhub.com › anatomy › the-atria-of-the-heartHeart (right and left atrium): Anatomy and function | Kenhub

    Aug 17, 2023 · Revise the anatomy of the atria and the other parts of the heart with our heart diagrams, quizzes and labeled worksheets. Once ventricular contraction stops and the pressure within the atria overcomes the pressure within the ventricles, the atrioventricular valves open and the blood passes into the ventricles.

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  6. www.verywellhealth.com › heart-anatomy-8654202Heart Anatomy: Labeled Diagram and Quick Reference

    Jun 11, 2024 · The heart's electrical signal originates in pacemaker cells within the sinus node (SN), which is located in the right atrium. This signal moves through the atria, making them contract and push blood into the ventricles.

  7. en.wikipedia.org › wiki › Atrium_(heart)Atrium (heart) - Wikipedia

    There are two atria in the human heart – the left atrium receives blood from the pulmonary circulation, and the right atrium receives blood from the venae cavae of the systemic circulation. During the cardiac cycle, the atria receive blood while relaxed in diastole, then contract in systole to move blood to the ventricles.

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  9. www.bbc.co.uk › bitesize › guidesThe structure of the heart - Structure and function of the ...

    The atria (plural of atrium) are where the blood collects when it enters the heart. The ventricles pump the blood out of the heart to the lungs or around the body. The septum separates the...

  10. teachmeanatomy.info › thorax › organsChambers of the Heart - Atria - Ventricles - TeachMeAnatomy

    Apr 19, 2023 · The heart consists of four chambers – two atria and two ventricles: Blood returning to the heart enters the atria, and is then pumped into the ventricles. From the left ventricle, blood passes into the aorta and enters the systemic circulation.

  11. www.kenhub.com › conducting-system-of-the-heartConduction system of the heart: Parts and Functions | Kenhub

    Aug 17, 2023 · Located in the interatrial septum, the AV node conducts electrical impulses from the SA node to the heart ventricles. This is achieved via atrioventricular bundles (a.k.a. bundle of His) and subendocardiac conducting network/Purkinje fibers located in the ventricle walls.

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