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Circulatory Pathway Of The Cardiovascular System

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The cardiovascular system is composed of two circulatory pathways:
Pulmonary circulation (the lungs) The pulmonary circulation is the circuit where deoxygenated blood travels away from the heart through pulmonary artery, through the lungs to become oxygenated, and back towards the heart through the pulmonary veins. The air sacs within the lungs called alveoli provide the surface area for gas exchange. Gas exchange occurs due to the pressure gradients between the alveoli of the lungs and the capillaries within the alveoli
2. Systematic circulation (rest of the body) The systematic circulation is the circuit where oxygenated blood is transported away from the heart and throughout the body. Then it carries the deoxygenated blood back to

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