the cardiac cycle :a heart beat

• what is meant by a atrial systole


  this is when both the atria contract and push the blood into the ventircals
• what happens when the atria in the heart contract (in terms of valves)


  the tricuspid and bicuspid valves open
• are the atria a area of high pressure or low pressure


  high pressure
• are the ventricles a area of high pressure or low pressure


  low pressure
• what is ventricular systole


  this is when both the ventricles contract
• what happens when the ventricles in the heart contract (in terms of valves)


  the tricuspid and bicuspid valves will close due to the pressure and the semi lunar valves will open
• what is meant by diastole


  this is when the atria and ventricles relax creating a low pressure in the heart
• what happens when the atria and ventricles relax(in terms of valves)


  the semi lunar valves will close due to blood in the aorta