Understanding the Human Heart: Blood Flow and Circulatory System Overview

Dec 12, 2025

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This overview explores the intricate workings of the human heart and circulatory system. It highlights the flow of oxygenated blood from the lungs through the pulmonary veins into the left atrium and ventricle, before being pumped to the body via the aorta. The role of valves, including the bicuspid and tricuspid, is explained, detailing how they prevent backflow and maintain efficient circulation. Finally, the systemic circulation process is examined, illustrating how deoxygenated blood returns to the lungs for reoxygenation, completing the vital cycle of blood circulation.

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Understanding the Human Heart: Blood Flow and Circulatory System Overview

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Presentation Transcript

Left Atrium Left Ventricle
Right Atrium Right Ventricle
Pulmonary Veins Oxygenated Blood “From Lungs” Pulmonary Veins Oxygenated Blood “From Lungs”
Oxygenated blood flows to the head, brain, and body. O2 diffuses across the membrane and returns as deoxygenated blood. Aortic Semilunar Valve Left Atrioventricular Valve “Bicuspid” Bicuspid valve closes and prevents the backflow of blood into the atrium Systemic Circulation
Pulmonarry Trunk Pulmonary Semilunar Valve Superior Vena Cava Right Atrioventricular Valve “Tricuspid” Inferior Vena Cava
Back to Lungs Back to Lungs