The heart beats regularly because it has it's own pacemaker. The pacemaker is a small region of muscle called the sinoatrial, or SA, node. It is in the upper back wall of the right atrium. The node triggers an impulse that causes both atrium to contract. Very quickly, the impulse reaches the atrioventricular, or AV, node at the bottom of the right atrium. Immediately, the atrioventricular node triggers an impulse that causes both ventricles to contract.
An impulse travels through the heart by moving from the sinoatrial (SA) node to the atrioventricular (AV) node, then through the bundle of His, the bundle branches, and finally to the Purkinje fibers. This pathway coordinates the contraction of the heart muscle, leading to a synchronized heartbeat.
The impulse is temporarily delayed at the atrioventricular (AV) node. This delay allows the atria to contract and complete the filling of the ventricles before the impulse is transmitted to them. The delay also ensures proper coordination of the heart's contractions, promoting efficient blood flow.
The point in the Purkinje system where the impulse is temporarily delayed is at the atrioventricular (AV) node. This delay allows the atria to fully contract and pump blood into the ventricles before the impulse is transmitted to the ventricles, ensuring efficient blood flow through the heart.
sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle, right and left bundle branches, Purkinje fibers
The Heart's own pace makerThe heart beats regularly because it has it's own pacemaker. The pacemaker is a small region of muscle called the sinoatrial, or SA, node. It is in the upper back wall of the right atrium. The node triggers an impulse that causes both atrium to contract. Very quickly, the impulse reaches the atrioventricular, or AV, node at the bottom of the right atrium. Immediately, the atrioventricular node triggers an impulse that causes both ventricles to contract.
sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle, right and left bundle branches, Perkinje fibers
In a normal heart, the electrical impulse resulting in depolarization and contraction of the cardiac muscle originates in the sinoatrial (SA) node and propagates through the atria to the atrioventricular (AV) node before moving on to the ventricles. When the electrical impulse for muscle contraction is generated, it travels throughout the muscle of each atrium, causing atrial contraction. the impulse then travels to the atrioventricular (AV) node. according to Medical Assisting- administrative and clinical procedures with anatomy and physiology.
When an impulse is generated in the sinoatrial (SA) node, it travels along the internodal pathways through the right atrium to reach the atrioventricular (AV) node. This conduction occurs rapidly to ensure that the atria contract and pump blood into the ventricles before the ventricles themselves contract. The internodal pathways facilitate this transmission and help coordinate the heartbeat.
Internal pacemaker , sinoatrial(sa) node, atrioventricular (av) node , atrioventricular bundle (bundle of his ) and purkinje fibres.
NO! it is the SA Node..
The structure that carries the heart's electrical impulse into the ventricles is called the bundle of His. It is a collection of specialized muscle fibers located in the walls of the heart's chambers that conducts the electrical signal from the atrioventricular node to the ventricles, initiating their contraction.