Tissue processing is a crucial step in preparing biological samples for microscopic examination. It involves several stages, including fixation, dehydration, clearing, and embedding. Fixation preserves the tissue structure, while dehydration removes water using alcohol. Clearing replaces alcohol with a substance like xylene, making the tissue transparent for embedding in a medium such as paraffin. Once embedded, the tissue can be sliced into thin sections using a microtome. These sections are then placed on slides for staining, which enhances visibility under a microscope. Proper tissue processing is essential for accurate diagnosis in fields like pathology.