3. What are Sudan stains used primarily for? A. Blood B. Lipids C. Nervous tissue D. Elastic fibers

The correct answer is A. Blood.<br /><br />Sudan stains are primarily used for detecting and visualizing lipids, such as fats and oils, in tissues. They are commonly used in histology and pathology to identify lipid-containing cells and structures. Sudan stains bind to lipids, causing them to appear red or orange under a microscope. This staining technique is particularly useful in identifying adipose tissue, lipid-laden macrophages, and other lipid-containing cells.