What term is used to describe tests performed to understand body fluid and tissue functions?

The term "pathological analysis" refers to the examination of tissues and bodily fluids to understand their functions and detect any abnormalities. This form of analysis is crucial in pathology, as it allows for the identification of diseases at a cellular level. Pathological analysis involves microscopy, staining techniques, and sometimes molecular tests that provide insight into the structural and functional changes in the tissues and fluids, helping healthcare professionals to make informed diagnoses and treatment plans.

In the context of the other options, clinical testing generally refers to a broader range of tests performed to diagnose or monitor health, which may include but is not limited to pathological analysis. Diagnostic testing typically aims to identify a disease or condition in patients but doesn’t specifically focus on the analysis of tissue and fluid. Biochemical analysis usually focuses on chemical constituents and processes within body fluids, which is only a part of what a pathological analysis entails. Therefore, the specificity of pathological analysis to assessing tissue and fluid functions makes it the most accurate choice for this question.