Each stage
Atrial diastole
Atria passively filling
Atrioventricular valves open
Cells found in the heart & able to self-generate, spread electrical activity from one cell to another
Myocardiocytes
What is the right atrium?
This chamber receives deoxygenated blood from the body
What is 20%?
About this percentage of ventricular filling comes from atrial contraction.
Blood flows from the left ventricle to the lungs.
False
Atrial systole
Action potential from the sinuatrial node (SAN)
Synchronous atrial contraction
Active filling of ventricles
Able to communicate through
What is the tricuspid valve?
This valve allows blood to flow from the right atrium to the right ventricle
What is it increases?
What happens to ventricular pressure during systole?
The pulmonary veins carry oxygenated blood.
True
Ventricular diastole
First third of the diastolic phase (early ventricular diastole): ventricular rapid inflow
Middle third of the diastolic phase (late ventricular diastole): passive inflow or diastasis
Last third of the diastolic phase (atrial diastole): ventricular filling due to atrial contraction (20%)
Structures that connect cardiac muscle cells, synchronized contraction & efficient electrical signal transmission in the heart
Intercalated disc
What is the pulmonary artery?
This vessel carries deoxygenated blood from the heart to the lungs
What is end-systolic volume?
This is the volume of blood left in the ventricle after contraction.
The tricuspid valve is located on the left side of the heart.
False
Ventricular systole
Isovolumetric contraction – atrioventricular and semilunar valves are closed
Semilunar valve opens
Emptying of the ventricle
End-systolic volume
Where ions can freely and rapidly flow from one cell to another
Syncytium
What is the left ventricle?
This chamber pumps oxygenated blood to the rest of the body
what is the left side?
This side of the heart pumps oxygenated blood to the body.
Ventricular systole is when the heart contracts.
True
What is isovolumetric contraction?
During this phase, all valves are closed and pressure increases in the ventricles
This vessel returns oxygenated blood from the lungs to the heart
Pulmonary vein?
What is the correct blood flow pathway through the heart and body?
Put this in order: lungs → left atrium → left ventricle → body → right atrium → right ventricle
What is the septum?
Structure that separates the right & left sides of the heart and prevents mixing of oxygenated and deoxygenated blood.
All heart valves are open during isovolumetric contraction.
False