Contraction And Relaxation Of The Heart Flashcards
What does the cardiac cycle maintain
The undirectional flow of blood in the heart
What is systole
Contraction
What is diastole
Relaxes
In ventricular diastole what does the heart do
Relaxes (both atria and ventricles) pressure drops
In ventricular diastole what does the blood fill
The atria from veins (Vena Cava/pulmonary vein)
In ventricular diastole what happens with blood and backflow
High pressure blood in the arteries but semilunar valves snap shit and prevent backflow into the heart
In atrial systole what does the atria do
Contract
what happens to pressure in atrial systole
Pressure in atria increases
what happens In atrial systole with the pressure and ventricles
Higher pressure in atria than ventricles opening the atrio-ventricular valve
In atrial systole where is blood forced into
The ventricles
In atrial systole what do valves in veins stop
Valves in veins stop blood going back into veins
In ventricular systole where do the ventricles contract from and what does this result in
Ventricles contract from the base upwards and this causes an increase in blood pressure
In ventricular systole ventricular pressure is higher than _________
Atrial pressure
What does ventricle pressure being higher than aortic pressure result in
Shutting the AV valve preventing backflow into atria
Ventricular pressure is higher than aortic pressure,what does this result in
The opening of the semi-lunar valve
Blood is forced through the semi-lunar valves into_____
Arteries (aorta/ pulmonary arteries)
What do bicuspid/tricuspid valves orevent
Backflow of blood into the atria
in ventricular systole what exactly causes an increase in blood pressure
Ventricles contract from the base upwards,causes increase in blood pressure
in ventricular systole what happens when ventricular pressure is higher than atrial pressure
Ventricular pressure higher than atrial pressure shutting the AV valve, preventing backflow into atria
in ventricular systole what hapens when ventricular pressure is higher than aortic pressure
the semi-lunar valve opens
in ventricular systole where is blood forced through
Blood forced through semilunar valves into arteries
in atrial systole what happens to the pressure
pressure in the atria increases
in atrial systole what exactly results in the atrio-ventricular valve opening
Higher pressure in atria then ventricles opening the atrio-ventricular valve
in atrial systole where is the blood forced into
Blood forced into ventricles
in atrial systole what do the valves in veins stop
Valves in veins stop blood going back into veins
what happens to the heart in ventricular diastole
Heart relaxes and pressure drops
where does the blood fill in ventricular diastole
Blood fills atria from veins
what happens when there is high pressure blood in the arteries
High pressure blood in the arteries but semilunar valves snap shit and prevent backflow into the heart
