SA node sends an impulse for the atria to contract. AV node is then activated which contracts the ventricles.
The Sinoatrial Node sends a wave of electric impulses through the heart, which causes both atria to contract.
the atriventriculart node causes both atria to contract
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.
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.
It then spreads to both the right and left atria, then to the AV node, then down the bundle of His to the Purkinje fibers where it spreads to both the left and right ventricles.
Impulse refers to both force and time....... Impulse=(the change in Force)*(time) OR Impulse=the change in Momentum
They both contract at the same time.
I am not sure, but i think they empty into the chambers.
The impulse on an object will be reduced by half when both the force and the time of contact are halved. Impulse is the product of force and time, so decreasing both will result in a proportional decrease in the impulse.
Contraction of both atria
There is only one SA(sinoatrial) node. It is located by the right atrium of the heart. it initiates the nerve impulse which travels through both atria to initiate atrial contraction. Then the impulse travels to the AV(atrial ventricular) node. the nerve impulse travels through the intraventricular septum to the apex of the heart, where it initiates the contraction of the ventricles(starting from the apex and squeezing the blood up and out of the arteries).
it can not be both!