This article analyzes the anatomical structure and functional mechanisms of the human heart as a vital organ responsible for blood circulation. The study focuses on the main components of the heart, including atria, ventricles, heart valves, and the conduction system. Particular attention is given to the cardiac cycle, mechanisms of myocardial contraction, and the role of the heart in systemic and pulmonary circulation. The findings contribute to a deeper understanding of cardiovascular physiology and its biological significance.

heart, anatomy, blood circulation, cardiac cycle, myocardium, physiology

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