Histological stains are dyes used to enhance the contrast of tissue sections under a microscope. Hematoxylin and eosin (H&E) is the most commonly used stain, providing clear differentiation between cell nuclei (stained blue) and cytoplasm (stained pink). Other stains include Masson's trichrome for connective tissue, Periodic acid-Schiff (PAS) for carbohydrates, and Silver stains for reticular fibers and nerve cells.
