ANATOMY

Detailed explanation-1: -The electrical impulse travels from the sinus node to the atrioventricular node (also called AV node). There, impulses are slowed down for a very short period, then continue down the conduction pathway via the bundle of His into the ventricles.

Detailed explanation-2: -When the Purkinje fibers deliver electrical signals to your ventricles, the ventricles contract. As they contract, blood flows from your right ventricle to your pulmonary arteries and from your left ventricle to your aorta. The aorta is the body’s largest artery. It sends blood from your heart to the rest of your body.

Detailed explanation-3: -Within a neuron, the impulse moves to the tip of an axon and causes the release of neurotransmitters, chemicals that act as messengers. Neurotransmitters pass through the synapse, the gap between two nerve cells, and attach to receptors on the receiving cell.

Detailed explanation-4: -Some of the myocardial muscle cells are specialized as fast-conducting Purkinje fibers that function to propagate the electrical signal that synchronizes contraction. Coronary arteries and capillaries that branch off the aorta provide blood flow to the myocardium.

Detailed explanation-5: -Heart Sequence of Electrical Conduction: Electrical signals move from the sinoatrial (SA) node to atrioventricular (AV) node in the atria, then move to a narrow group of Purkinje cells called the bundle of His and finally move to the Purkinje fibers in the left and right ventricles.