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Who comes first atrial systole or ventricle systole?
Atrial systole -- The atrium contracts, then the ventricle.
What is atrial repolarization indicated by?
The atrial repolarization occurs during the QRS complex of the ECG but is obscured by the ventricle depolarization.
What is atrial diastole?
Atrial refers to the top portion of the heart and diastole is when the heart is at rest. Atrial diastole would be when the top portion of the heart is not beating.
Why is the ventricle of the frog's heart thicker and more muscular than the atria?
A ventricle's walls are thicker than those of the atrium because it needs to generate higher pressure. This higher pressure is needed to push blood into the circulation, while the atrium only needs to push blood into the ventricle.
Is the left ventricle the first to depolarize?
No, the right ventricle is first to depolarize, that is if you're talking about ventricular depolarization (the QRS complex). If not, then it's the right atrium (atrial depolarization, P wave).
What is the purpose of the auricle in the heart?
The Auricle increases the volume of the atrium.Right auricle collects the deoxygenated blood and pushes it to the right ventricle. Left auricle collects the oxygenated blood from lungs and pushes it towards left ventricle.
Which chambers of the heart are responsible for pumping blood throughout the lungs and body?
The right ventricle pumps blood to the lungs to pick up oxygen, while the left ventricle pumps oxygen-rich blood to the body's tissues.
Which heart valves prevent backflow into the ventricles?
The semilunar valves prevent backflow into the ventricles. The pulmonary semilunar valve prevents backflow in the right ventricle, and the aortic semilunar valve prevents backflow of blood in the left ventricle.
What is the significance differences in thickness of ventricular wall?
the right ventricle contains deoxegynated blood, but the left ventricle pumps oxygenated blood out at a much more forceful rate (it has to get to the rest of you body). Therefore, the left ventricle wall is thicker. =]
What is the atrial systole?
When the smaller, upper atria chambers contract in the first phase of systole, they send blood down to the larger, lower ventricle chambers.
What is the fucntion of the Bicuspid Valve?
The bicuspid valve is known better as the mitral valve. During diastole, a normally-functioning mitral valve opens as a result of increased pressure from the left atrium as it fills with blood (preloading). As atrial pressure increases above that of the left ventricle, the mitral valve opens. Opening facilitates the passive flow of blood into the left ventricle. Diastole ends with atrial contraction, which ejects the final 20% of blood that is transferred from the left atrium to the left ventricle. This amount of blood is known asend diastolic volume(EDV), and the mitral valve closes at the end of atrial contraction to prevent a reversal of blood flow.
What are the function of the left ventricle and the right ventricle?
The left ventricular chamber of the heart is responsible for pumping blood out of your heart and through your arteries to the rest of the body. The right ventricle, receives blood returning in the veins from the rest of the body. It them sends it to be re-oxigenated in the lungs
