This study examines the anatomical structure of the heart, its conduction system, and coronary blood supply. The paper highlights the functional significance of cardiac chambers, myocardial layers, and valves in maintaining effective blood circulation. Special attention is given to the cardiac conduction system, including the sinoatrial node, atrioventricular node, Bundle of His, and Purkinje fibers, which ensure rhythmic and coordinated contractions. In addition, the role of coronary arteries in supplying oxygen and nutrients to the myocardium is analyzed. The study emphasizes that the integrity of these systems is essential for normal cardiac function, and their impairment may lead to serious cardiovascular diseases.

Heart, cardiac structure, conduction system, coronary circulation, myocardium, atria, ventricles, cardiac physiology, blood supply, cardiovascular diseases.

Libby P, Bonow R. O., Mann D. L., Zipes D. P.. Braunwald’s Heart Disease: a review of cardiovascular medicine // Journal of the American College of Cardiology. – 2020. – Vol. 75, № 20. – P. 2523–2535.

Mozaffarian D, Benjamin E. J., Go A. S.. Heart Disease and Stroke Statistics Update // Circulation. – 2021. – Vol. 143, № 8. – P. e254–e743.

Katz A. M.. Physiology of the heart: myocardial function // Heart. – 2019. – Vol. 105, № 12. – P. 915–920.

Heusch G. Coronary circulation and myocardial ischemia // European Heart Journal. – 2020. – Vol. 41, № 10. – P. 1023–1031.

Mangoni M. E., Nargeot J.. Genesis and regulation of the heart automaticity // Physiological Reviews. – 2021. – Vol. 101, № 2. – P. 831–885.

Boyett M. R.. The sinoatrial node and cardiac conduction system // Nature Reviews Cardiology. – 2018. – Vol. 15, № 5. – P. 282–294.

Guyton and Hall. Медицинская физиология / Дж. Э. Холл, А. К. Гайтон. – М.: ГЭОТАР-Медиа, 2021. – 1120 с.

Henry Gray. Анатомия человека / Г. Грей. – М.: Эксмо, 2020. – 1550 с.