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  • >> THE NORMAL HEART HAS TWO SIDES, A RIGHT SIDE

  • AND A LEFT SIDE-- AND FOUR CHAMBERS,

  • THE TOP RECEIVING CHAMBERS OR ATRIA, AND THE LOWER CHAMBERS,

  • WHICH ARE THICK-WALLED PUMPING CHAMBERS,

  • CALLED VENTRICLES.

  • A RED BLOOD CELL WILL COME FROM EITHER THE SUPERIOR VENA CAVA

  • OR THE INFERIOR VENA CAVA AND ENTER INTO THE RIGHT ATRIUM.

  • THE BLOOD THEN FLOWS ACROSS THE TRICUSPID VALVE

  • TO THE RIGHT VENTRICLE.

  • THE RIGHT VENTRICLE THEN SQUEEZES AND EJECTS THAT BLOOD

  • CELL INTO A VESSEL CALLED THE "PULMONARY ARTERY."

  • THE PULMONARY ARTERY SPLITS INTO TWO VESSELS EACH GOING TO THE LUNGS.

  • AS THAT RED BLOOD CELL MAKES ITS WAY THROUGH THE LUNG,

  • IT RETURNS THROUGH THE PULMONARY VEINS TO THE LEFT ATRIUM.

  • THAT BLOOD IS NOW OXYGENATED.

  • IT'S PICKED UP OXYGEN THEN GOES ACROSS THE MITRAL VALVE

  • INTO THE LEFT VENTRICLE, WHICH DOES MOST OF THE WORK IN TERMS

  • OF DELIVERY OF BLOOD FLOW TO THE BODY.

  • THAT BLOOD CELL IS NOW EJECTED INTO THE AORTA TO SOME ORGAN

  • OR MUSCLE OR SKIN IN THE HUMAN BODY.

>> THE NORMAL HEART HAS TWO SIDES, A RIGHT SIDE

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B2 H-INT blood cell blood ventricle pulmonary artery atrium

How a Normal Heart Pumps Blood -- The Children's Hospital of Philadelphia

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    Bing-Je   posted on 2013/12/12
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