Homonym: circulation (Distribution)
Circulation refers to the movement of fluids within a system. In the human body, it primarily describes how blood travels through blood vessels to deliver oxygen and nutrients to cells while removing waste products. This process is essential for maintaining health and supporting various bodily functions.
In a broader context, circulation can also apply to the movement of air or water in the environment. For example, ocean currents circulate warm and cold water across the globe, influencing climate and weather patterns. Similarly, air circulation in a room helps maintain a comfortable temperature and distribute fresh air.