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
