cirkulacija

Cirkulacija refers to the process of circulation, most commonly within the context of biological systems. In biology, circulation describes the movement of fluids throughout an organism. The most well-known example is the circulatory system in animals, which transports blood, nutrients, oxygen, carbon dioxide, hormones, and waste products. This system typically involves a heart, blood vessels (arteries, veins, capillaries), and the circulating fluid itself, such as blood or lymph. The continuous pumping action of the heart ensures that these vital substances reach all parts of the body and that waste products are removed. Different organisms have varying degrees of circulatory complexity; for instance, some simple organisms may not possess a distinct circulatory system and rely on diffusion for transport. Beyond biology, the term "cirkulacija" can also be used more broadly to describe any cyclical movement or flow, such as the circulation of air in a room or the circulation of money in an economy. However, its primary association remains with biological fluid transport.