Which term means 'how thick or thin a fluid is'?

• A. Cavity
• B. Consistency
• C. Cardiac
• D. Chronology

Answer: (B)

In medical terms, how thick or thin a fluid is described by its viscosity, and in nursing practice this idea is captured with the word consistency. Consistency refers to the thickness or thinness of fluids such as drainage, stool, or IV solutions, and it helps guide care decisions—thicker fluids may indicate different drainage management or require different handling than thin, watery fluids.

The other terms don’t fit this meaning: a cavity is a hollow space, cardiac relates to the heart, and chronology deals with the order of events in time. Therefore, consistency is the term that best expresses how thick or thin a fluid is.