Fundamentals of Circulatory Physiology and Heart Function

Understanding how the human body transports oxygen, nutrients, and waste is fundamental to mastering human biology and health sciences. This course guides you through the complex mechanics of the cardiovascular system, explaining how the heart and blood vessels work in perfect harmony. By reading through our structured lessons and completing written exercises, you will develop a clear, foundational grasp of cardiac mechanics, blood composition, and circulatory pathways. You will transition from basic anatomical terms to a deep understanding of how the heart adapts to physical demands and maintains systemic balance. What you'll learn: Understand the differences between open and closed circulatory systems across different organisms; Analyze the composition of blood, including the vital roles of plasma, red and white blood cells, and platelets; Explore the phases of the cardiac cycle, detailing how the heart pumps blood efficiently through systemic and pulmonary pathways; Examine the regulation of blood pressure and how the nervous system controls heart rate; Apply physiological concepts to modern health indicators, such as understanding heart rate variability and basic digital cardiovascular metrics. The course begins with essential terminology and the evolutionary background of circulation before diving into blood chemistry and the mechanics of the cardiac pump. You will progress through blood vessel dynamics and finish with an introduction to modern cardiovascular health monitoring. This course is designed for beginners, pre-med students, biology enthusiasts, and anyone curious about human anatomy, with no prior medical background required. Start reading today to unlock a clear understanding of the human heart and circulatory system.