Atrio ventricular valves

• After systole, the ventricular walls relax and recoil:

  The pressure in the ventricles rapidly drops below the pressure in the atria

  Blood in the atria pushes the atrioventricular valves open

  Blood entering the heart flows straight through the atria and into the ventricles

  The pressure in the atria an vetricles rises slowly as they fill with blood

  The valves remain open while the atria contract, closing when atria relax. caused by a swirling action when ventricles are full

  As ventricles contract pressure increases
• What happens in the atrio ventricular valves after systole?

  The pressure in the ventreicles rapidly drops below the pressure in the atria. blood in the atria pushes the atrio ventricular valves open. blood entering the heart flows straight through the atria into the ventricles. the pressure in the atria and the ventricles rises slowly as they fill with blood. the valves remain open while the atria contract but close when thew atria begins to relax- this closure is caused by a swirling action in the blood around the valvews when the ventricle is full.
• What happens to the atrio ventricular valves if there is a swirling action in the blood around them?


  The valves will close if there is a swirling action around them when the ventricle is full.
• What happens to the atroventricular valves when tthere is ventricular systole?


  As the ventricles begin to contract (systole) the pressure of the blood in the ventricles will increase. when the pressure in the ventricles rises tabove the atrial pressure then the blood starts to move upwards. This movement fills the valve pockets and keeps them closed. The tendinous cords attached to the valves prevents them from turning inside out, preventing blood from flowing back into the atria.