Fixatives are chemicals used to preserve biological tissues by stabilizing their structure and composition. The primary purpose of fixation is to prevent autolysis and decomposition, which can occur after the tissue is removed from the body. Formaldehyde is a commonly used fixative that cross-links proteins, effectively "freezing" the tissue in a life-like state. This preservation is crucial for maintaining the tissue's histological integrity, allowing for accurate analysis and diagnosis. Fixation also enhances the staining properties of tissues, making it easier to observe specific structures under a microscope.
