In biological and medical contexts, circulation refers to the continuous movement and flow of blood throughout the cardiovascular system, driven by the pumping action of the heart. This vital process transports oxygen, nutrients, hormones, and cellular waste products to and from every tissue and organ in the body. Arteries carry oxygen-rich blood away from the heart to peripheral extremities, while veins return deoxygenated blood back to the heart and lungs for replenishment. Efficient circulation is essential for sustaining cellular metabolism, maintaining body temperature, regulating immune responses, and ensuring optimal physiological health.
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