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The "beat" of your heart is the contraction of the right and left ventricles.
The right atrium passes blood from the body into the right ventricle -- when the ventricle contracts, it forces shut the valve leading back to the atrium, and the blood is pushed into the pulmonary arteries that lead to the lungs.
The blood returns from the lungs to the left atrium, and flows into the left ventricle. When the left ventricle contracts, the blood is pushed out of the ventricle into the aorta, the body's main artery, to be carried through the arterial system to the various parts of the body.
What else can I help you with?
What happen after depolarization of the ventricles?
The ventricles contract.
Where is blood pumped when ventricles contract?
Into the heart
Do the ventricles contract at the apex or at the base of the heart?
Not really sure what you mean by the base, the ventricles contract from the Apex (which is at the bottom) upwards.
What contract together to pump blood?
The ventricles contract to pump blood out of the heart.
Why is it an advantage for the ventricles to contract from the bottom?
The pulmonary artery and the aorta lead upward and away from the ventricles. Since the ventricles contract from the bottom, blood is more efficiently pushed out of the heart.
What are the electrical impulses in the heart that are relayed to the ventricles by what?
A junction box, also known as the AV node, is how electrical impulses in the heart are relayed to the ventricles. The ventricles help make the muscle contract and then pump the blood.
What is cardiac preload?
it is the amount of blood available for the heart to pump when the ventricles contract
What fibers in the heart cause the ventricles to contract?
pukinje fibers
What is happening during a complete heart block?
Complete heart block is where the electrical impulses from the SA node of the heart cannot reach the ventricles along the normal pathway. Instead the atrial contract from the SA node singles and the ventricles contract from the ventricular cells
What does the atrioventricular node cause to contract?
The atrioventricular (AV) node causes the ventricles of the heart to contract. It serves as a critical relay point in the electrical conduction system, receiving impulses from the sinoatrial (SA) node and delaying them briefly before transmitting them to the ventricles via the bundle of His. This delay allows the atria to fully contract and empty their blood into the ventricles before the ventricles contract.
What carries electrical impulses across the heart and causes the ventricles contract?
SA node.
During a heartbeat what do the ventricles do while the atria relax?
they are in the heart of humans only
