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What is the normal resting heart beat
70 bpm
What are the two phases called
Contraction - systole
Relaxation - diastole
What all the 3 different stages called
Atrial systole
Ventricular systole
Diastole
How does blood moved through the heart
Through the 3 different stages
Atrial systole
Ventricular systole
Diastole
What happens when the atrial systole occurs
The pressure in the atrium slowly rises as blood flows into the atrium from the veins
Walls of the atrium contract
Pressure in the atrium is higher than the ventricle
The bicuspid and tricuspid valves are forced to open
Blood flows into the ventricle
What happens when the ventricular systole occurs
The ventricle wall contracts
The ventricle pressure increases until it's higher than that of the aorta
The semi-lunar values open
The flow of blood closes the bicuspid and tricuspid values
Blood is forced into aorta causing he pressure in the aorta to increase
A “ lub “ sound is heard
What happen when the diastole stage occurs
The ventricle and the atrium relax
The pressure in the ventricle is lower than the aorta
The pressure in the aorta is kept higher by elastic recoil of the elastic tissue in the middle layer
The semi - lunar values are forced to closd
A “ dub “ sound is heard