The heart cells I’m referring to are specialized heart cells that are part of the electrical conduction system of the heart. They make up the atria and ventricles and may acquire electrical signals to lead to the atria and ventricles to contract. “Nevertheless, most leisure athletes expend upwards of 50 https://seymoure753uhw1.theblogfairy.com/29257413/the-polarized-heart-diaries