Cell biology plays an essential role in forensic science because biological evidence is composed of cells. The cell is the basic structural unit of living organisms and contains the genetic material DNA inside the nucleus. Forensic scientists analyze cells found in blood, saliva, skin, hair, and other biological samples to identify individuals connected to a crime scene. When biological evidence is collected from a crime scene, DNA is extracted from the nucleus of cells and analyzed using modern techniques such as Polymerase Chain Reaction (PCR) and DNA profiling. These methods allow investigators to compare DNA obtained from the crime scene with DNA samples from suspects. In addition, cell biology helps forensic experts identify the type of cells present in the evidence, such as epithelial cells, blood cells, or tissue cells. Determining the type of cells can help identify the origin of the biological sample. Therefore, understanding cell structure, including the nucleus, cytoplasm, and plasma membrane, is fundamental for the analysis of forensic biological evidence. Al-Mustaqbal University – the first university in Iraq.