Which of these is a step in the tissue processing sequence?

The step involved in the tissue processing sequence that is correctly identified is section-cutting. This phase is critical in histopathology as it involves slicing the processed tissue into thin sections that can be placed on glass slides for microscopy. Proper section-cutting allows for the detailed examination of tissue architecture and cellular characteristics, which are vital for diagnosis.

In the context of the tissue processing sequence, section-cutting follows the embedding step, where tissues are infiltrated with a medium such as paraffin. This process ensures that the tissues are adequately supported for thin slicing. The resulting sections are typically around 4 to 5 microns thick and are crucial for subsequent staining and microscopic evaluation.

The other options, while relevant to histopathology, do not represent distinct steps in the tissue processing sequence. Microscoping refers to the act of examining the tissues under a microscope, which occurs after processing is complete. Cellular analysis pertains to evaluating the cellular components but is not a procedural step in the actual processing of the tissue. Visualization usually refers to the subsequent interpretation of stained slides but is not part of the processing steps. Thus, section-cutting occupies a vital role in facilitating the transition from processed tissue to a slide ready for diagnostic analysis.