Which of the following Is the portion of a centrifuged urine sample used for microscoplc examination?

Artifacts are structures that appear in a specimen due to the preparation process rather than being naturally present in the sample. While they may be observed during microscopic examination, they do not represent the actual components of the urine and are not a specific portion used for analysis.

Casts are cylindrical structures formed in the renal tubules and can be found within the sediment of a urine sample. However, they are just one type of component that may be identified during the examination, not the entirety of the sample that is analyzed microscopically.

Crystals are solid particles that can also be found in the sediment of a urine sample. Like casts, they are components that can be examined but do not encompass the totality of what is analyzed in a centrifuged urine sample.

The supernatant is the clear liquid that remains above the sediment after centrifugation. It contains dissolved substances from the urine but is not used for microscopic examination, as it does not contain the solid particles of interest.