The word 器官 (qìguān, meaning "organ") is formed by combining two conceptual characters: 器 (qì), which means "vessel", "tool", or "instrument", and 官 (guān), which originally meant "official" or "functionary". Together, they create a metaphorical compound where 器 represents the physical, container-like aspect of a body part, and 官 imparts the idea of it having a specific, duty-bound function, analogous to an official in a bureaucracy. Thus, the formation visualizes an organ as a dedicated biological instrument or vessel performing a vital governmental role within the body's system.