Describe the Electrical System That Controls the Heartbeat
The sinoatrial SA node located in the right atrium of your heart. Muscle cells enable your hearts chambers to contract an action triggered by. Ventricular Fibrillation The heartbeat starts in the heart itself due to the sino-atrial node SAN. . Sympathetic innervation increases the rhythmicity of the SA node and the heart rate increases. Your hearts electrical system controls the timing of your heartbeat by regulating your. The autonomic nervous system ANS is responsible for controlling many physiological functions. Each time your heart beats electrical signals travel through your heart. The Autonomic Nervous System. All this activity produces electrical waves we can measure. The expansion and contraction control blood flow through your heart and body. A healthy heart supplies your body with the right amount of blood at the rate needed to work well. It induces the force of contraction of the heart and its h...