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The alternationg expansion and contraction of artery walls caused by the contrction and relaxation of the ventricles can be felt if you touch your wrist?
Pulse
What is meant by systole and diastole?
The ventricles of heart have two states: systole(contraction) and diastole (relaxation). During diastole blood fills the ventricles and during systole the blood is pushed out of the heart into the arteries. The auricles contract anti-phase to the ventricles and chiefly serve to optimally fill the ventricles with blood.http://www.answers.com/systole
Describe how heart contraction and relaxation influence coronary blood flow?
When relaxation or diastole is occurring in the atria blood flows through the atria and the AV valves into the ventricles. When contraction or systole is occurring in the atria the remaining blood that doesn't flow through during relaxation is pushed into the ventricles. As the atria relax, the ventricles begin contracting; ventricular pressure rises, closing the AV valves. Ventricular pressure continues rising until it exceeds the pressure in the large arteries stemming from the ventricles. The SL valves are forced open and blood is expelled from the ventricles into the aorta and pulmonary trunk. During this phase the ventricles relax because the blood is no longer compressed in their chambers. Blood expelled into the aorta and pulmonary trunk backflows toward the heart, which then closes the SL valves. During the ventricle contraction the atria stays in relaxation, filling with blood and when blood pressure on the atrial side of the AV valves exceeds that in the ventricles, the AV valves are forced open and ventricular filling begin all over again.
What difference atria and ventricles fetal pig?
the difference between the ventricles and the atria is that the ventricles are thicker
How many ventricles do a pig heart have?
There are two ventricles in the pig heart
What is the phase of ventricular relaxation?
Yes, when the AV valves open and blood begins to enter the ventricles they are in isotonic relaxation. This is why the pressure does not increase in the ventricles during this time.
The pressure in the arteries during relaxation of the ventricles is know as?
systole
The alternative expansion and contraction of the artery walls caused by the contraction and relaxation of the ventricles?
Pulse
What occurs during left ventricular relaxation?
open
Which ecg wave must occur before the ventricles can relax?
The T wave on an ECG must occur before the ventricles can relax. This wave represents the repolarization of the ventricles, signifying that they have finished contracting and are now primed for relaxation.
The relaxation phase of the heartbeat is called?
The relaxation phase of the heartbeat is called diastole. During diastole, the heart ventricles relax and fill with blood in preparation for the next contraction.
The alternationg expansion and contraction of artery walls caused by the contrction and relaxation of the ventricles can be felt if you touch your wrist?
Pulse
Period of heart contraction?
Contraction of the ventricles and atria is called systole. Relaxation is called diastole.
What is meant by systole and diastole?
The ventricles of heart have two states: systole(contraction) and diastole (relaxation). During diastole blood fills the ventricles and during systole the blood is pushed out of the heart into the arteries. The auricles contract anti-phase to the ventricles and chiefly serve to optimally fill the ventricles with blood.http://www.answers.com/systole
Describe how heart contraction and relaxation influence coronary blood flow?
When relaxation or diastole is occurring in the atria blood flows through the atria and the AV valves into the ventricles. When contraction or systole is occurring in the atria the remaining blood that doesn't flow through during relaxation is pushed into the ventricles. As the atria relax, the ventricles begin contracting; ventricular pressure rises, closing the AV valves. Ventricular pressure continues rising until it exceeds the pressure in the large arteries stemming from the ventricles. The SL valves are forced open and blood is expelled from the ventricles into the aorta and pulmonary trunk. During this phase the ventricles relax because the blood is no longer compressed in their chambers. Blood expelled into the aorta and pulmonary trunk backflows toward the heart, which then closes the SL valves. During the ventricle contraction the atria stays in relaxation, filling with blood and when blood pressure on the atrial side of the AV valves exceeds that in the ventricles, the AV valves are forced open and ventricular filling begin all over again.
Is systolic pressure where the ventricls are relaxing?
Relaxation = Diastole Contraction of the atria=Atrial systole Contraction of the ventricles = Ventricular systole
What happens to the A-V valves during vestricular relaxation?
During ventricular relaxation, the A-V valves (tricuspid and mitral valves) remain closed to prevent the backflow of blood from the ventricles into the atria. This closure helps maintain the direction of blood flow through the heart and ensures efficient filling of the ventricles during the next phase of the cardiac cycle.
