circualción
Circulación refers to the movement of substances within a system. In biology, it most commonly refers to the circulatory system, which is responsible for transporting blood, oxygen, nutrients, hormones, and waste products throughout the body of an organism. This system typically involves a pump, such as the heart, and a network of vessels, like arteries, veins, and capillaries. In humans and other vertebrates, the circulatory system is a closed system, meaning the blood is contained within vessels at all times.
Beyond biological contexts, circulation can describe the movement of air, such as in weather patterns or ventilation