What describes serous fluid?

Serous fluid is typically described as a clear, yellowish or straw-colored fluid that is found in various body cavities, such as blisters or around organs. It is produced by serous membranes, which line certain cavities and provide a lubricating function, reducing friction between organs. The fluid is not indicative of infection or a blood presence, which is why the other color descriptions—red-tinted, colorless clear, or greenish drainage—do not accurately describe serous fluid. A red-tinted drainage suggests the presence of blood, while a greenish drainage often indicates an infection due to the presence of neutrophils and bacteria. A colorless, clear drainage, while also not fitting the definition of serous fluid, might be more closely associated with other types of bodily fluids or specific conditions. Thus, the description identifying serous fluid correctly aligns with the yellow-tinted drainage appearance.