Explore a comprehensive 32-minute video guide on the regulation of the heartbeat. Delve into the principles behind cardiac regulation, including myogenic, neural, and humoral mechanisms. Learn about the Frank-Starling mechanism, Bowditch effect, and the roles of sympathetic and parasympathetic nervous systems. Examine the medullary control of the cardiovascular system, chemoreceptors, and baroreceptors. Investigate the intracardiac nervous system and various humoral factors like the Renin-Angiotensin-Aldosterone System, thyroid hormones, and natriuretic peptides. Understand the effects of calcium and potassium levels on heart function. Conclude with a summary and quiz to reinforce your understanding of this crucial aspect of cardiovascular physiology.