What is the purpose of routine stains in histology?

• A. Demonstrate the tissue components uniformly
• B. Preserve tissues without staining
• C. Bind to silver solution
• D. Enhance fluorescent signals

Answer: (A)

Providing uniform contrast to reveal tissue morphology is what routine stains accomplish. The most common combination, hematoxylin and eosin, highlights different tissue components so you can see overall architecture clearly. Hematoxylin stains basophilic structures like nuclei and ribosomal RNA a blue-purple color, while eosin stains acidophilic components such as cytoplasm, collagen, and muscle fibers pink. This contrast lets you distinguish cell boundaries, tissue types, and organization, which is essential for identifying normal structure and detecting pathology. Routine stains come after fixation to visualize components; they aren’t used for tissue preservation, silver binding, or enhancing fluorescent signals.