Circulation of the heart

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  • the heart
    • Arteries Away
    • vEins rEturn
    • Atrial systole
      • ventricles
        • relaxed
        • pressure increases
        • volume increases
      • atria
        • contract
        • volume decreases
        • pressure increases
      • BLOOD: ATRIA TO VENTRICLE
    • ventricular systole
      • atria
        • pressure lower than ventricles
          • AV valves shut
            • no backflow
        • relaxed
      • ventricles
        • contract
        • pressure increases
        • volume increases
      • BLOOD: VENTRICLE TO AORTA PULMONARY ARTERY
    • Diastole
      • ventricles
        • relaxed
      • atria
        • relaxed
        • blood starts to return
      • pressure in pulmonary artery and aorta high
        • SL valves close

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