What controlles heart beat?

Answer 1

First off, know that your heartbeat is mechanically controlled. A node in your body called the SA node (Sinoatrial node) starts the whole process of giving you beats. The SA node is also called the Pacemaker simply because pacemaker means leader, the one who sets the pace in a race, the set of nerves that stimulate the heart to beat. So to make the process easy to understand, lets view it in an orderly list :) 1. The SA node sends electrical impulses from the top chamber of the heart (Atrium) 2. Then the atrium contracts (presses together - squeezes) and sends blood to the bottom chamber (Ventricle) 3. Then the electrical impulses are in the ventricles through a node called AV node (Atrioventricular node) - the 2nd node that sends electrical impulses after the SA node 4. So the impulse spreads throughout the ventricles (right & left), the muscles contract and then pump out blood 5. Blood from the right ventricle goes to your lungs & blood from the left ventricle goes to your whole body. I hope that answers your question