cardiac cycle Flashcards by Lara Whitton

Q

atrial systole

A

atria contract
atria pressure higher than ventricle pressure
atrio ventricular valves open
blood flow atria to ventricles

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Q

atrial systole

A

atria contract
atria pressure higher than ventricle pressure
atrio ventricular valves open
blood flow atria to ventricles

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Q

ventricular systole

A

ventricles contract
ventricle pressure higher than atria pressure
atrio ventricular valves close
due to higher pressure semi lunar valves open
blood flow ventricle to arteries

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Q

diastole

A

ventricles relax
ventricle pressure lower than atria pressure
semi lunar valves close
blood in veins returns back to heart
ventricular pressure lower than atria pressure
atrio ventricular valves reopen
blood from atria to ventricles

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Q

valves

A

prevent back flow of the blood

- close under high pressure

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Q

ventricular systole

A

ventricles contact
ventricle pressure higher than atria pressure
atrio ventricular valves close
due to higher pressure semi lunar valves open
blood flow ventricle to arteries

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Q

diastole

A

ventricles relax
ventricle lower pressure than artery
semi lunar valves close
blood in veins returns back to heart
ventricular pressure lower than atria pressure atrio ventricular valves re open
blood from atria to ventricles

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